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Geology 320: Mineralogy and crystalography
Minerals
148
Geology
Undergraduate 4
11/10/2011
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Term

[image]

 

 Definition

Graphite

Native Element

Luster: Sub Metallic

Hardness: 1.5-2

Color: Black to Grey

Streak: Blackish grey

Crystal System: Hexagonal

Density: 2.16 g/cm3

Cleavage/Fracture: 0001 Perfect

Chemical Formula: C

 
Term

Luster: Sub Metallic

Hardness: 1.5-2

Color: Black to Grey

Streak: Blackish grey

Crystal System: Hexagonal

Density: 2.16 g/cm3

Cleavage/Fracture: 0001 Perfect

 Definition
[image]
Term
Graphite
 Definition
Chemical Formula: C
Term
[image]
 Definition

 Sulfur:

 Chemical Formula: S8

 Luster: Resinous

 Hardness: 1.5-2.5

 Color: Yellow, Brown, Red, Green

 Streak: White (maybe “pale Yellow” from yellow)

 Crystal System: Orthorhombic  

 Density: 2.06

 Cleavage/Fracture: N/A  

Cool Stuff:  Might smell a little

 

 

 
Term
Sulfur
 Definition

 

 

Chemical Formula: S8

 

Luster: Resinous

 

Hardness: 1.5-2.5

 

Color: Yellow, Brown, Red, Green

 

Streak: White (maybe “pale Yellow” from yellow)

 

Crystal System: Orthorhombic  

 

Density: 2.06

 

Cleavage/Fracture: N/A  

 

Cool Stuff:  Might smell a little

 

 

 
Term
Copper
 Definition

Chemical Formula: Cu

 Luster: Metallic

 Hardness: 2.5-3

 Color: Brown, Red, Pink

 Streak: Rose

Crystal System: Isometric  

 Density: 8.94

Cleavage/Fracture: N/A

 
Term
[image]
 Definition

Copper

Chemical Formula: Cu

 Luster: Metallic

 Hardness: 2.5-3

Color: Brown, Red, Pink

 Streak: Rose

 Crystal System: Isometric  

 Density: 8.94

 Cleavage/Fracture: N/A

 

 
Term

Luster: Metallic

Hardness: 2.5-3

Color: Brown, Red, Pink

Streak: Rose

Crystal System: Isometric  

Density: 8.94

Cleavage/Fracture: N/A

 

 Definition

Copper

Chemical Formual: Cu
Term

 Luster: Metallic

Hardness: 6.5

 Color: Pale Brass, Yellow

 Streak: Greenish Black

 Crystal System: Isometric

 Density: 5.01 g/cm3

 Cleavage/Fracture: 110,100 Poor

Definition

 Pyrite

chemical Formula: FeS2

 

 
Term
Pyrite
 Definition

 

Luster: Metallic

 

Hardness: 6.5

 

Color: Pale Brass, Yellow

 

Streak: Greenish Black

 

Crystal System: Isometric

 

Density: 5.01 g/cm3

 

Cleavage/Fracture: 110,100 Poor

 

Chemical Formula: FeS2

 

 

 
Term
[image]
 Definition

 

Pyrite:

 

Luster: Metallic

 

Hardness: 6.5

 

Color: Pale Brass, Yellow

 

Streak: Greenish Black

 

Crystal System: Isometric

 

Density: 5.01 g/cm3

 

Cleavage/Fracture: 110,100 Poor

 

Chemical Formula: FeS2

 

 

 
Term
 Definition

 

Pyrrhotite:

 

Luster: Metallic [pale, not as shiny as pyrite]

 

Hardness: 3.5-4

 

Color: Bronze, Red, Brown

 

Streak: Grey Black

 

Crystal System: Monoclinic

 

Density: 4.61g.cm3

 

Cleavage/Fracture: 0001, 1120 Imperfect    

 

Chemical Formula: FeS

 

 

 

 

 
Term
Pyrrhotite
 Definition

 

Pyrrhotite:

 

Luster: Metallic [pale, not as shiny as pyrite]

 

Hardness: 3.5-4

 

Color: Bronze, Red, Brown

 

Streak: Grey Black

 

Crystal System: Monoclinic

 

Density: 4.61

 

Cleavage/Fracture: 0001, 1120 Imperfect    

 

Chemical Formula: FeS

 

 

 

 

 
Term

Luster: Metallic [pale, not as shiny as pyrite]

 Hardness: 3.5-4

 Color: Bronze, Red, Brown

 Streak: Grey Black

 Crystal System: Monoclinic

 Density: 4.61

 Cleavage/Fracture: 0001, 1120 Imperfect    

 Definition

Pyrrhotite: 

Chemical Formula: FeS

 

 
Term
 Definition

 

Chalcopyrite:

 

Luster: Metallic

 

Hardness: 3.5

 

Color: Brass, Honey, Yellow

 

Streak: Greenish Black

 

Crystal System: Tetragonal

 

Density: 4.19

 

Cleavage/Fracture: 112 Indistinct

 

Chemical Formula: CuFeS2

 

Cool Stuff:  Smaller “goldish” specks than pyrite

 

 

 

 

 

 

 
Term

 Chalcopyrite

 

 

 

 Definition

Luster: Metallic

 

Hardness: 3.5

 

Color: Brass, Honey, Yellow

 

Streak: Greenish Black

 

Crystal System: Tetragonal

 

Density: 4.19

 

Cleavage/Fracture: 112 Indistinct

 

Chemical Formula: CuFeS2

 

Cool Stuff:  Smaller “goldish” specks than pyrite

 

 

 

 

 

 

 

 
Term

 

 

Luster: Metallic

 

Hardness: 3.5

 

Color: Brass, Honey, Yellow

 

Streak: Greenish Black

 

Crystal System: Tetragonal

 

Density: 4.19

 

Cleavage/Fracture: 112 Indistinct

 

 

Cool Stuff:  Smaller “goldish” specks than pyrite

 

 

 

 

 

 

 

 Definition

 

Chalcopyrite:

 

 

 

Chemical Formula: CuFeS2

 


 

 

 

 

 

 

 
Term
[image]
 Definition

 

Galena:

 

Luster: Metallic

 

Hardness: 2.5

 

Color: Light/Dark Gray

 

Streak: Grayish Black, silvery

 

Crystal System: Isometric

 

Density: 7.4

 

Cleavage/Fracture: 001,100,010 Perfect  

 

Chemical Formula: PbS

 
Term

 

Galena

 

 Definition

 

 

Luster: Metallic

 

Hardness: 2.5

 

Color: Light/Dark Gray

 

Streak: Grayish Black, silvery

 

Crystal System: Isometric

 

Density: 7.4

 

Cleavage/Fracture: 001,100,010 Perfect  

 

Chemical Formula: PbS

 
Term

 


 

Luster: Metallic

 

Hardness: 2.5

 

Color: Light/Dark Gray

 

Streak: Grayish Black, silvery

 

Crystal System: Isometric

 

Density: 7.4

 

Cleavage/Fracture: 001,100,010 Perfect  

 


 

 Definition

 

Galena

 

Chemical Formula: PbS

 
Term
 Definition

 

Sphalorite:

 

Luster: Resinous-Greasy

 

Hardness: 3.5-4

 

Color: Brown, Yellow, Green, Black, Red

 

Streak: Brownish [tanish] White

 

Crystal System: Isometric

 

Density: 4.05 g/cm3

 

Cleavage/Fracture: 110 Perfect 

 

Chemical Formula: (Zn,Fe)S

 

 

 

 

 
Term

 

Sphalorite

 

 

 

 

 

 Definition

 

Sphalorite:

 

Luster: Resinous-Greasy

 

Hardness: 3.5-4

 

Color: Brown, Yellow, Green, Black, Red

 

Streak: Brownish [tanish] White

 

Crystal System: Isometric

 

Density: 4.05 g/cm3

 

Cleavage/Fracture: 110 Perfect 

 

Chemical Formula: (Zn,Fe)S

 

 

 

 

 
Term

 

 

Luster: Resinous-Greasy

 

Hardness: 3.5-4

 

Color: Brown, Yellow, Green, Black, Red

 

Streak: Brownish [tanish] White

 

Crystal System: Isometric

 

Density: 4.05 g/cm3

 

Cleavage/Fracture: 110 Perfect 

 


 

 

 

 

 

 Definition

Sphalorite

(Zn,Fe) S
Term
Chalcocite
 Definition

 

Chalcocite:

 

Luster: Metallic

 

Hardness: 2.5-3

 

Color: Blue, Gray, Black, purpleish

 

Streak: Grayish Black

 

Crystal System: Monoclinic

 

Density: 5.65 g/cm3

 

Cleavage/Fracture: 110 Indistinct

 

Chemical Formula: Cu2S

 

 

 
Term
[image]
 Definition

 

Chalcocite:

 

Luster: Metallic

 

Hardness: 2.5-3

 

Color: Blue, Gray, Black, purpleish

 

Streak: Grayish Black

 

Crystal System: Monoclinic

 

Density: 5.65 g/cm3

 

Cleavage/Fracture: 110 Indistinct

 

Chemical Formula: Cu2S

 

 

 
Term

 

Chalcocite:

 

Luster: Metallic

 

Hardness: 2.5-3

 

Color: Blue, Gray, Black, purpleish

 

Streak: Grayish Black

 

Crystal System: Monoclinic

 

Density: 5.65 g/cm3

 

Cleavage/Fracture: 110 Indistinct

 

Chemical Formula: Cu2S

 

 

 

 Definition

 Chalcocite:

 Chemical Formula: Cu2S

 

 

 
Term
 Definition

 

Bornite:

 

Luster: Metallic

 

Hardness: 3

 

Color: Copper Red, Brown, Purple

 

Streak: Grayish Black

 

Crystal System: Orthorhombic

 

Density: 5.09

 

Cleavage/Fracture: 111 Perfect

 

Chemical Formula: Cu5FeS4

 

 

 

 

 

 

 
Term

Bornite

 

 Definition

 

Bornite:

 

Luster: Metallic

 

Hardness: 3

 

Color: Copper Red, Brown, Purple

 

Streak: Grayish Black

 

Crystal System: Orthorhombic

 

Density: 5.09

 

Cleavage/Fracture: 111 Perfect

 

Chemical Formula: Cu5FeS4

 

 

 

 

 

 

 
Term

 

 

Luster: Metallic

 

Hardness: 3

 

Color: Copper Red, Brown, Purple

 

Streak: Grayish Black

 

Crystal System: Orthorhombic

 

Density: 5.09

 

Cleavage/Fracture: 111 Perfect

 

 

 

 

 

 

 

 Definition

 

Bornite

 

 

 

 

 

 

 

 

 
Term
[image]
 Definition

 

Nickeline:

 

Luster: Metallic

 

Hardness: 5.5

 

Color: Grey, Copper, Black

 

Streak: Brownish Black

 

Crystal System: Hexagonal

 

Density: 7.79

 

Cleavage/Fracture: 1010 Perfect, 0001 Imperfect   

 

Chemical Formula: NiAs

 
Term
Nickeline
 Definition

 

Nickeline:

 

Luster: Metallic

 

Hardness: 5.5

 

Color: Grey, Copper, Black

 

Streak: Brownish Black

 

Crystal System: Hexagonal

 

Density: 7.79

 

Cleavage/Fracture: 1010 Perfect, 0001 Imperfect   

 

Chemical Formula: NiAs

 

 
Term

 

 

Luster: Metallic

 

Hardness: 5.5

 

Color: Grey, Copper, Black

 

Streak: Brownish Black

 

Crystal System: Hexagonal

 

Density: 7.79

 

Cleavage/Fracture: 1010 Perfect, 0001 Imperfect   

 


 

 Definition

 

Nickeline:

 

 

Chemical Formula: NiAs

 
Term
 Definition

 

Tetrahedrite:

 

Luster: Metallic  

 

Hardness: 3.5-4

 

Color: Grey Black

 

Streak: Black

 

Crystal System: Isometric  

 

Density: 4.9

 

Cleavage/Fracture: N/A

 

Chemical Formula: (Cu,Fe)12Sb4S13

 
Term

 

 

Luster: Metallic  

 

Hardness: 3.5-4

 

Color: Grey Black

 

Streak: Black

 

Crystal System: Isometric  

 

Density: 4.9

 

Cleavage/Fracture: N/A

 

 

 

 Definition

 

Tetrahedrite:

 

 

 
Term

 

Tetrahedrite

 

 

 

 Definition

 


 

Luster: Metallic  

 

Hardness: 3.5-4

 

Color: Grey Black

 

Streak: Black

 

Crystal System: Isometric  

 

Density: 4.9

 

Cleavage/Fracture: N/A

 

Chemical Formula: (Cu,Fe)12Sb4S13

 
Term
[image]
 Definition

 

Covellite:

 

Luster: Metallic

 

Hardness: 1.5-2

 

Color: Indego, Light/Dark Blue, Black

 

Streak: Gray Black

 

Crystal System: Hexagonal

 

Density: 4.68

 

Cleavage/Fracture: 0001 Perfect

 

Chemical Formula: CuS

 

 

 
Term

Covellite

 

 

 Definition

 

13 Covellite:

 

Luster: Metallic

 

Hardness: 1.5-2

 

Color: Indego, Light/Dark Blue, Black

 

Streak: Gray Black

 

Crystal System: Hexagonal

 

Density: 4.68

 

Cleavage/Fracture: 0001 Perfect

 

Chemical Formula: CuS

 

 

 

 
Term

 


 

Luster: Metallic

 

Hardness: 1.5-2

 

Color: Indego, Light/Dark Blue, Black

 

Streak: Gray Black

 

Crystal System: Hexagonal

 

Density: 4.68

 

Cleavage/Fracture: 0001 Perfect

 


 

 

 

 Definition

 

13 Covellite:

 

 

 

Chemical Formula: CuS

 

 

 
Term
 Definition

 

14 Cinnabar:

 

Luster: Adamantine

 

Hardness: 2-2.5

 

Color: Gray, Brown, Pink, Vermilion

 

Streak: Bright Red

 

Crystal System: Triagonal

 

Density: 8.1

 

Cleavage/Fracture: 1010 Perfect 

 

Chemical Formula: HgS

 
Term

 

 

Luster: Adamantine

 

Hardness: 2-2.5

 

Color: Gray, Brown, Pink, Vermilion

 

Streak: Bright Red

 

Crystal System: Triagonal

 

Density: 8.1

 

Cleavage/Fracture: 1010 Perfect 

 


 

 Definition

 

 

Cinnabar:

 

Chemical Formula: HgS

 
Term

Cinnabar

 

 

 

 Definition

 

Cinnabar:

 

Luster: Adamantine

 

Hardness: 2-2.5

 

Color: Gray, Brown, Pink, Vermilion

 

Streak: Bright Red

 

Crystal System: Triagonal

 

Density: 8.1

 

Cleavage/Fracture: 1010 Perfect 

 

Chemical Formula: HgS

 
Term
[image]
 Definition

Realgar:

 

Luster: Sub metallic

 

Hardness: 1.5-2

 

Color: Aurora Red, Orange, Yellow. Dark Red

 

Streak: Orange

 

Crystal System: Monoclinic

 

Density: 3.56

 

Cleavage/Fracture: 010 Good

 

Chemical Formula: AsS

 
Term

 

Realgar:

 

 

 

 Definition

 

Realgar:

 

Luster: Sub metallic

 

Hardness: 1.5-2

 

Color: Aurora Red, Orange, Yellow. Dark Red

 

Streak: Orange

 

Crystal System: Monoclinic

 

Density: 3.56

 

Cleavage/Fracture: 010 Good

 

Chemical Formula: AsS

 
Term

 

 

Luster: Sub metallic

 

Hardness: 1.5-2

 

Color: Aurora Red, Orange, Yellow. Dark Red

 

Streak: Orange

 

Crystal System: Monoclinic

 

Density: 3.56

 

Cleavage/Fracture: 010 Good

 


 

 Definition

 

15 Realgar:

 

 

 

Chemical Formula: AsS

 
Term
[image]
 Definition

 

Orpiment:

 

Luster: Pearly

 

Hardness: 1.5-2

 

Color: Lemon Yellow, Bronze Yellow, Orange Yellow

 

Streak: Pale Yellow

 

Crystal System: Monoclinic

 

Density: 3.52 g/cm3

 

Cleavage/Fracture: 010 Perfect

 

Chemical Formula: As2S3

 
Term

 

Orpiment

 


 

 Definition

 

16 Orpiment:

 

Luster: Pearly

 

Hardness: 1.5-2

 

Color: Lemon Yellow, Bronze Yellow, Orange Yellow

 

Streak: Pale Yellow

 

Crystal System: Monoclinic

 

Density: 3.52 g/cm3

 

Cleavage/Fracture: 010 Perfect

 

Chemical Formula: As2S3

 
Term

Luster: Pearly

 

Hardness: 1.5-2

 

Color: Lemon Yellow, Bronze Yellow, Orange Yellow

 

Streak: Pale Yellow

 

Crystal System: Monoclinic

 

Density: 3.52 g/cm3

 

Cleavage/Fracture: 010 Perfect

 

Chemical Formula: As2S3

 

 Definition

 Orpiment:

Chemical Formula: As2S3

 
Term
[image]
 Definition

 

17 Arsenopyrite:

 

Luster: Metallic

 

Hardness: 5

 

Color: Tin White, Light Steel

 

Streak: Black

 

Crystal System: Monoclinic  

 

Density: 6.07 g/cm3

 

Cleavage/Fracture: 110 Distinct 

 

Chemical Formula: FeAsS

 

 

 
Term

 

 

Luster: Metallic

 

Hardness: 5

 

Color: Tin White, Light Steel

 

Streak: Black

 

Crystal System: Monoclinic  

 

Density: 6.07 g/cm3

 

Cleavage/Fracture: 110 Distinct 

 


 

 

 

 Definition

 

17 Arsenopyrite:

 

Chemical Formula: FeAsS

 

 

 
Term
Arsenopyrite
 Definition

 

17 Arsenopyrite:

 

Luster: Metallic

 

Hardness: 5

 

Color: Tin White, Light Steel

 

Streak: Black

 

Crystal System: Monoclinic  

 

Density: 6.07 g/cm3

 

Cleavage/Fracture: 110 Distinct 

 

Chemical Formula: FeAsS

 

 

 
Term

 

 

Luster: Metallic

 

Hardness: 1

 

Color: Black Grey

 

Streak: Greenish Grey, Steel Grey

 

Crystal System: Hexagonal

 

Density: 5.5 g/cm3

 

Cleavage/Fracture: 0001 Perfect

 


 

 

 

 Definition

 

18 Molybdenite:

 

 

 

Chemical Formula: MoS2

 

 

 
Term

 

 Molybdenite

 

 


 

 

 

 Definition

 

18 Molybdenite:

 

Luster: Metallic

 

Hardness: 1

 

Color: Black Grey

 

Streak: Greenish Grey, Steel Grey

 

Crystal System: Hexagonal

 

Density: 5.5 g/cm3

 

Cleavage/Fracture: 0001 Perfect

 

Chemical Formula: MoS2

 

 

 
Term
 Definition

 

19 Marcasite:

 

Luster: Metallic

 

Hardness: 6-6.5

 

Color: Bronze, Light Brass, Tin White, Goldish

 

Streak: Grey-green-Brownish Black

 

Crystal System: Orthorhombic

 

Density: 4.89 g/cm3

 

Cleavage/Fracture: 010 Indistinct  

 

Chemical Formula: FeS2

 
Term
Marcasite
 Definition

Luster: Metallic

 

Hardness: 6-6.5

 

Color: Bronze, Light Brass, Tin White, Goldish

 

Streak: Grey-green-Brownish Black

 

Crystal System: Orthorhombic

 

Density: 4.89 g/cm3

 

Cleavage/Fracture: 010 Indistinct  

 

Chemical Formula: FeS2

 
Term

 


 

Luster: Metallic

 

Hardness: 6-6.5

 

Color: Bronze, Light Brass, Tin White, Goldish

 

Streak: Grey-green-Brownish Black

 

Crystal System: Orthorhombic

 

Density: 4.89 g/cm3

 

Cleavage/Fracture: 010 Indistinct  

 


 

 Definition

 

19 Marcasite:

 

Chemical Formula: FeS2

 
Term
 Definition

 

20 Stibnite:

 

Luster: Metallic

 

Hardness: 2

 

Color: Grey Blue Steel Lead Gray

 

Streak: Blackish Grey

 

Crystal System: Orthorhombic

 

Density: 4.63 g/cm3

 

Cleavage/Fracture: 010 Perfect   

 

Chemical Formula: Sb2S3

 

 

 
Term

 

 Stibnite

 

 


 

 

 

 Definition

 

20 Stibnite:

 

Luster: Metallic

 

Hardness: 2

 

Color: Grey Blue Steel Lead Gray

 

Streak: Blackish Grey

 

Crystal System: Orthorhombic

 

Density: 4.63 g/cm3

 

Cleavage/Fracture: 010 Perfect   

 

Chemical Formula: Sb2S3

 

 

 
Term

 

Luster: Metallic

 

Hardness: 2

 

Color: Grey Blue Steel Lead Gray

 

Streak: Blackish Grey

 

Crystal System: Orthorhombic

 

Density: 4.63 g/cm3

 

Cleavage/Fracture: 010 Perfect   

 


 

 

 

 Definition

 

Stibnite

 

 

Chemical Formula: Sb2S3

 

 

 

 
Term
 Definition

 

22 Hematite

 

Luster: Metallic

 

Hardness: 6.5

 

Color: Black Steel

 

Streak: Reddish Brown/black

 

Crystal System: Triagonal

 

Density: 5.3 g/cm3

 

Cleavage/Fracture: None 

 

Chemical Formula: Fe2O3

 
Term

22 Hematite

 

Luster: Metallic

 

Hardness: 6.5

 

Color: Black Steel

 

Streak: Reddish Brown/black

 

Crystal System: Triagonal

 

Density: 5.3 g/cm3

 

Cleavage/Fracture: None 

 

Chemical Formula: Fe2O3

 

 Definition

 

Hematite

Chemical Formula: Fe2O3

 
Term

 

 Hematite

 

 

 

 Definition

 

22 Hematite

 

Luster: Metallic

 

Hardness: 6.5

 

Color: Black Steel

 

Streak: Reddish Brown/black

 

Crystal System: Triagonal

 

Density: 5.3 g/cm3

 

Cleavage/Fracture: None 

 

Chemical Formula: Fe2O3

 
Term
 Definition

 

21 Geothite:

 

Luster: Adamantine Silky

 

Hardness: 5-5.5

 

Color: Brown, Red, Yellow

 

Streak: Yellowish Brown

 

Crystal System: Orthorhombic

 

Density: 3.8 g/cm3

 

Cleavage/Fracture: 010 Perfect, 100 Distinct  

 

Chemical Formula: FeO(OH)

 
Term

 


 

Luster: Adamantine Silky

 

Hardness: 5-5.5

 

Color: Brown, Red, Yellow

 

Streak: Yellowish Brown

 

Crystal System: Orthorhombic

 

Density: 3.8 g/cm3

 

Cleavage/Fracture: 010 Perfect, 100 Distinct  

 


 

 Definition

 

21 Geothite:

 

Chemical Formula: FeO(OH)

 
Term

 

Geothite

 

 

 

 Definition

 

21 Geothite:

 

Luster: Adamantine Silky

 

Hardness: 5-5.5

 

Color: Brown, Red, Yellow

 

Streak: Yellowish Brown

 

Crystal System: Orthorhombic

 

Density: 3.8 g/cm3

 

Cleavage/Fracture: 010 Perfect, 100 Distinct  

 

Chemical Formula: FeO(OH)

 
Term
 Definition

 

23 Hematite:

 

Luster: Rustic Earthy

 

Hardness: 6.5

 

Color: Reddish Gray

 

Streak: Reddish Brown

 

Crystal System: Triagonal

 

Density: 5.3 g/cm3

 

Cleavage/Fracture: None 

 

Chemical Formula: Fe2O3

 

 

 

 

 
Term

Luster: Rustic Earthy

 

Hardness: 6.5

 

Color: Reddish Gray

 

Streak: Reddish Brown

 

Crystal System: Triagonal

 

Density: 5.3 g/cm3

 

Cleavage/Fracture: None 

 


 

 

 

 

 

 Definition

23 Hematite:

Chemical Formula: Fe2O3

 

 

 

 

 
Term

Hematite

Fe2O3

 Definition

 

23 Hematite

 

Luster: Rustic Earthy

 

Hardness: 6.5

 

Color: Reddish Gray

 

Streak: Reddish Brown

 

Crystal System: Triagonal

 

Density: 5.3 g/cm3

 

Cleavage/Fracture: None 

 

Chemical Formula: Fe2O3

 

 

 

 

 
Term
 Definition

 

24 Magnetite:

 

Luster: Metallic

 

Hardness: 5.5-6

 

Color: Greenish Black, Iron Black

 

Streak: Black

 

Crystal System: Isometric

 

Density: 5.15 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: Fe3O4

 

Other: Magnetic

 
Term

 

Magnetite

 

 

 

 Definition

 

24 Magnetite:

 

Luster: Metallic

 

Hardness: 5.5-6

 

Color: Greenish Black, Iron Black

 

Streak: Black

 

Crystal System: Isometric

 

Density: 5.15 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: Fe3O4

 

Other: Magnetic

 
Term

 


 

Luster: Metallic

 

Hardness: 5.5-6

 

Color: Greenish Black, Iron Black

 

Streak: Black

 

Crystal System: Isometric

 

Density: 5.15 g/cm3

 

Cleavage/Fracture: None

 

Magnetic

 

 Definition

 

24 Magnetite

Chemical Formula: Fe3O4

 


 
Term
Magnetite
 Definition

 

24 Magnetite:

 

Luster: Metallic

 

Hardness: 5.5-6

 

Color: Greenish Black, Iron Black

 

Streak: Black

 

Crystal System: Isometric

 

Density: 5.15 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: Fe3O4

 

Other: Magnetic

 
Term
 Definition

 

25 Chromite:

 

Luster: Metallic

 

Hardness: 5.5

 

Color: Tanish Brown

 

Streak: Brown

 

Crystal System: Isometric

 

Density: 4.79 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: FeCr2O4

 
Term

 

25 Chromite:

 

Luster: Metallic

 

Hardness: 5.5

 

Color: Tanish Brown

 

Streak: Brown

 

Crystal System: Isometric

 

Density: 4.79 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: FeCr2O4

 

 Definition

 

Chromite:

 


 

Chemical Formula: FeCr2O4

 
Term

 

25 Chromite:

 

Chemical Formula: FeCr2O4

 

 Definition

 

25 Chromite:

 

Luster: Metallic

 

Hardness: 5.5

 

Color: Tanish Brown

 

Streak: Brown

 

Crystal System: Isometric

 

Density: 4.79 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: FeCr2O4

 
Term
 Definition

 

26 Cuprite:

 

Luster: Adamantine

 

Hardness: 3.5-4

 

Color: Brown, Red, Purple, Black

 

Streak: Brownish Red

 

Crystal System: Isometric

 

Density: 6.1 g/cm3

 

Cleavage/Fracture: 111 Perfect 

 

Chemical Formula: Cu2O

 
Term

 

Luster: Adamantine

 

Hardness: 3.5-4

 

Color: Brown, Red, Purple, Black

 

Streak: Brownish Red

 

Crystal System: Isometric

 

Density: 6.1 g/cm3

 

Cleavage/Fracture: 111 Perfect 

 

 

 Definition

 

26 Cuprite:

 

Chemical Formula: Cu2O

 
Term
Cuprite
 Definition

 

26 Cuprite:

 

Luster: Adamantine

 

Hardness: 3.5-4

 

Color: Brown, Red, Purple, Black

 

Streak: Brownish Red

 

Crystal System: Isometric

 

Density: 6.1 g/cm3

 

Cleavage/Fracture: 111 Perfect 

 

Chemical Formula: Cu2O

 
Term
 Definition

 

27 Ilmenite:

 

Luster: Sub Metallic

 

Hardness: 5-5.5

 

Color: Iron Black

 

Streak: Brownish Black

 

Crystal System: Triagonal

 

Density: 4.75 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: FeTiO3

 
Term

 

Luster: Sub Metallic

 

Hardness: 5-5.5

 

Color: Iron Black

 

Streak: Brownish Black

 

Crystal System: Triagonal

 

Density: 4.75 g/cm3

 

Cleavage/Fracture: None

 


 

 Definition

 

27 Ilmenite:

 

 

 

Chemical Formula: FeTiO3

 
Term
 Definition

 

29 Corundum:

 

Luster: Vitreous Glassy

 

Hardness: 9

 

Color: Blue, Red, Yellow, Brown, Grey

 

Streak: None

 

Crystal System: Triagonal

 

Density: 4.05 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: Al2O3

 

 

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 9

 

Color: Blue, Red, Yellow, Brown, Grey

 

Streak: None

 

Crystal System: Triagonal

 

Density: 4.05 g/cm3

 

Cleavage/Fracture: None

 


 

 

 

 Definition

 

29 Corundum:

 

 

 

Chemical Formula: Al2O3

 

 

 
Term

 

Corundum:

 

 

 

 

 

 Definition

 

29 Corundum:

 

Luster: Vitreous Glassy

 

Hardness: 9

 

Color: Blue, Red, Yellow, Brown, Grey

 

Streak: None

 

Crystal System: Triagonal

 

Density: 4.05 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: Al2O3

 

 

 
Term
 Definition

 

30 Pyrolusite:

 

Luster: Sub Metallic

 

Hardness: 6-6.5, 2 when Massive

 

Color: Steel Grey, Bluish

 

Streak: Black

 

Crystal System: Tetragonal

 

Density: 4.75 g/cm3

 

Cleavage/Fracture: 110 Perfect 

 

Chemical Formula: MnO2

 

 

 

 

 
Term

 

 

Luster: Sub Metallic

 

Hardness: 6-6.5, 2 when Massive

 

Color: Steel Grey, Bluish

 

Streak: Black

 

Crystal System: Tetragonal

 

Density: 4.75 g/cm3

 

Cleavage/Fracture: 110 Perfect 

 

 

 

 

 

 

 Definition

 

30 Pyrolusite:

 

Chemical Formula: MnO2

 

 

 

 

 
Term

 

Pyrolusite:

 

 

 

 

 

 

 

 Definition

 

30 Pyrolusite:

 

Luster: Sub Metallic

 

Hardness: 6-6.5, 2 when Massive

 

Color: Steel Grey, Bluish

 

Streak: Black

 

Crystal System: Tetragonal

 

Density: 4.75 g/cm3

 

Cleavage/Fracture: 110 Perfect 

 

Chemical Formula: MnO2

 

 

 

 

 
Term
 Definition

 

31 Romanechite:

 

Luster: Sub Metallic

 

Hardness: 5-6

 

Color: Grey, Black, Steel

 

Streak: Brown Black

 

Crystal System: Monoclinic

 

Density: 6.45 g/cm3

 

Cleavage/Fracture: None

 

Chemical Formula: ((Ba,H2O)2(Mn+4,Mn+3)5O10) 

 

 

 

 

 
Term

 

Romanechite:

 

 

 

 

 

 

 

 Definition

 

31 Romanechite:

 

Luster: Sub Metallic

 

Hardness: 5-6

 

Color: Grey, Black, Steel

 

Streak: Brown Black

 

Crystal System: Monoclinic

 

Density: 6.45 g/cm3

 

Cleavage/Fracture: None

 


 

 

 

 

 
Term

 


 

Luster: Sub Metallic

 

Hardness: 5-6

 

Color: Grey, Black, Steel

 

Streak: Brown Black

 

Crystal System: Monoclinic

 

Density: 6.45 g/cm3

 

Cleavage/Fracture: None

 


 

 

 

 

 

 Definition

 

31 Romanechite:

 

 

 

 

 

 

 
Term
 Definition

 

32 Zincite:

 

Luster: Sub Metallic

 

Hardness: 4-5

 

Color: Yellow, Dark Red, Orange

 

Streak: Yellow Orange-brown [Usually from the redish rock]

 

Crystal System: Hexagonal

 

Density: 5.56 g/cm3

 

Cleavage/Fracture: 0001 Perfect

 

Chemical Formula: (Zn,Mn)O

 
Term

 

 

Luster: Sub Metallic

 

Hardness: 4-5

 

Color: Yellow, Dark Red, Orange

 

Streak: Yellow Orange-brown [Usually from the redish rock]

 

Crystal System: Hexagonal

 

Density: 5.56 g/cm3

 

Cleavage/Fracture: 0001 Perfect

 


 

 Definition

 

32 Zincite:

 

 

 

Chemical Formula: (Zn,Mn)O

 
Term

 

Zincite:

 

 

 


 

 Definition

 

32 Zincite:

 

Luster: Sub Metallic

 

Hardness: 4-5

 

Color: Yellow, Dark Red, Orange

 

Streak: Yellow Orange-brown [Usually from the redish rock]

 

Crystal System: Hexagonal

 

Density: 5.56 g/cm3

 

Cleavage/Fracture: 0001 Perfect

 

Chemical Formula: (Zn,Mn)O

 
Term
 Definition

 

33 Franklinite:

 

Luster: Sub Metallic

 

Hardness: 5.5-6

 

Color: Black Brownish

 

Streak: Reddish Brown

 

Crystal System: Isometric

 

Density: 5.14 g/cm3

 

Cleavage/Fracture: None 

 

Chemical Formula: (Zn,Mn,Fe)(Fe,Mn)2O4

 
Term

 


 

Luster: Sub Metallic

 

Hardness: 5.5-6

 

Color: Black Brownish

 

Streak: Reddish Brown

 

Crystal System: Isometric

 

Density: 5.14 g/cm3

 

Cleavage/Fracture: None 

 


 

 Definition

 

Franklinite:

 

 

 
Term
Franklinite
 Definition

 

33 Franklinite:

 

Luster: Sub Metallic

 

Hardness: 5.5-6

 

Color: Black Brownish

 

Streak: Reddish Brown

 

Crystal System: Isometric

 

Density: 5.14 g/cm3

 

Cleavage/Fracture: None 

 

Chemical Formula: (Zn,Mn,Fe)(Fe,Mn)2O4

 
Term
 Definition

 

34 Rutile:

 

Luster: Adamantine

 

Hardness: 6-6.5

 

Color: Brown, Yellow, Red, Blue, Violet

 

Streak: Brownish White

 

Crystal System: Tetrahedral

 

Density: 4.25g/cm3

 

Cleavage/Fracture: 110 Distinct

 

Chemical Formula: TiO2

 

 

 
Term

 


 

Luster: Adamantine

 

Hardness: 6-6.5

 

Color: Brown, Yellow, Red, Blue, Violet

 

Streak: Brownish White

 

Crystal System: Tetrahedral

 

Density: 4.25g/cm3

 

Cleavage/Fracture: 110 Distinct

 


 

 

 

 Definition

 

34 Rutile:

 

Luster: Adamantine

 

Hardness: 6-6.5

 

Color: Brown, Yellow, Red, Blue, Violet

 

Streak: Brownish White

 

Crystal System: Tetrahedral

 

Density: 4.25g/cm3

 

Cleavage/Fracture: 110 Distinct

 

Chemical Formula: TiO2

 

 

 
Term
Rutile
 Definition

 

34 Rutile:

 

Luster: Adamantine

 

Hardness: 6-6.5

 

Color: Brown, Yellow, Red, Blue, Violet

 

Streak: Brownish White

 

Crystal System: Tetrahedral

 

Density: 4.25g/cm3

 

Cleavage/Fracture: 110 Distinct

 

Chemical Formula: TiO2

 

 

 
Term
 Definition

 

35 Cassiterite: (Other)

 

Luster: Adamantine

 

Hardness: 6-7

 

Color: Brown, Black, Colorless, Green, Gray

 

Streak: Brownish White

 

Crystal System: Tetrahedral

 

Density: 6.9

 

Cleavage/Fracture: 100 Perfect 110 Indistinct  

 

Chemical Formula: SnO2

 
Term

 

 

Luster: Adamantine

 

Hardness: 6-7

 

Color: Brown, Black, Colorless, Green, Gray

 

Streak: Brownish White

 

Crystal System: Tetrahedral

 

Density: 6.9

 

Cleavage/Fracture: 100 Perfect 110 Indistinct  

 


 

 Definition

 

35 Cassiterite: (Other)

 

 

Chemical Formula: SnO2

 
Term

 

Cassiterite

 

 Definition

 

35 Cassiterite: (Other)

 

Luster: Adamantine

 

Hardness: 6-7

 

Color: Brown, Black, Colorless, Green, Gray

 

Streak: Brownish White

 

Crystal System: Tetrahedral

 

Density: 6.9

 

Cleavage/Fracture: 100 Perfect 110 Indistinct  

 

Chemical Formula: SnO2

 
Term
 Definition

 

36 Halite:

 

Luster: Vitreous Glassy

 

Hardness: 2.5

 

Color: Pink, Light/Dark Blue, White

 

Streak: White

 

Crystal System: Isometric

 

Density: 2.17

 

Cleavage/Fracture: 100, 010, 001 Perfect 

 

Chemical Formula: NaCl

 
Term

 

Halite

 

 

 

 Definition

 

36 Halite:

 

Luster: Vitreous Glassy

 

Hardness: 2.5

 

Color: Pink, Light/Dark Blue, White

 

Streak: White

 

Crystal System: Isometric

 

Density: 2.17

 

Cleavage/Fracture: 100, 010, 001 Perfect 

 

Chemical Formula: NaCl

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 2.5

 

Color: Pink, Light/Dark Blue, White

 

Streak: White

 

Crystal System: Isometric

 

Density: 2.17

 

Cleavage/Fracture: 100, 010, 001 Perfect 

 


 

 Definition

 

 

36 Halite 

 

Chemical Formula: NaCl

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 5

 

Color: White, Yellow, Green, Blue, Red

 

Streak: White

 

Crystal System: Hexagonal

 

Density: 3.19

 

Cleavage/Fracture: 0001, 1010 Indistinct

 


 

 

 

 Definition

 

Apatite

 

 

 

 

 
Term
Apatite
 Definition

 

37 Apatite:

 

Luster: Vitreous Glassy

 

Hardness: 5

 

Color: White, Yellow, Green, Blue, Red

 

Streak: White

 

Crystal System: Hexagonal

 

Density: 3.19

 

Cleavage/Fracture: 0001, 1010 Indistinct

 

Chemical Formula: Ca5(PO4)3(OH,F,Cl)

 

 

 
Term
 Definition

 

38 Fluorite:

 

Luster: Vitreous Glassy

 

Hardness: 4

 

Color: White, Yellow, Green, Red, Blue

 

Streak: White

 

Crystal System: Isometric

 

Density: 3.13

 

Cleavage/Fracture: 111 Perfect

 

Chemical Formula: CaF2

 

 

 

 

 

 

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 4

 

Color: White, Yellow, Green, Red, Blue

 

Streak: White

 

Crystal System: Isometric

 

Density: 3.13

 

Cleavage/Fracture: 111 Perfect

 


 

 

 

 

 

 

 

 Definition

 

38 Fluorite:

 

Chemical Formula: CaF2

 

 

 

 

 

 

 
Term

 

Fluorite

 

 

 

 

 

 

 

 

 Definition

 

38 Fluorite:

 

Luster: Vitreous Glassy

 

Hardness: 4

 

Color: White, Yellow, Green, Red, Blue

 

Streak: White

 

Crystal System: Isometric

 

Density: 3.13

 

Cleavage/Fracture: 111 Perfect

 

Chemical Formula: CaF2

 

 

 

 

 

 

 
Term
 Definition

 

39Anhydrite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5

 

Color: Colorless, White, Bluish White, Violet, Grey

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 2.97

 

Cleavage/Fracture: 010 100 001 Perfect

 

Chemical Formula: CaSO4

 

 

 

 

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 3.5

 

Color: Colorless, White, Bluish White, Violet, Grey

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 2.97

 

Cleavage/Fracture: 010 100 001 Perfect

 


 

 

 

 

 

 Definition

 

39Anhydrite:

 

 

 

Chemical Formula: CaSO4

 

 

 

 

 
Term
Annhydrite
 Definition

 

39Anhydrite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5

 

Color: Colorless, White, Bluish White, Violet, Grey

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 2.97

 

Cleavage/Fracture: 010 100 001 Perfect

 

Chemical Formula: CaSO4

 

 

 

 

 
Term
 Definition

 

40 Gypsum:

 

Luster: Pearly

 

Hardness: 2

 

Color: White, Colorless, Green, Yellow, Brown

 

Streak: White

 

Crystal System: Monoclinic

 

Density: 2.3

 

Cleavage/Fracture: 010 100 Perfect 011 Distinct

 

Chemical Formula: CaSO4(H2O)

 

 

 
Term

 


 

Luster: Pearly

 

Hardness: 2

 

Color: White, Colorless, Green, Yellow, Brown

 

Streak: White

 

Crystal System: Monoclinic

 

Density: 2.3

 

Cleavage/Fracture: 010 100 Perfect 011 Distinct

 


 

 

 

 Definition

 

Gypsum

 

 

 

 

 
Term
Gypsum
 Definition

 

40 Gypsum:

 

Luster: Pearly

 

Hardness: 2

 

Color: White, Colorless, Green, Yellow, Brown

 

Streak: White

 

Crystal System: Monoclinic

 

Density: 2.3

 

Cleavage/Fracture: 010 100 Perfect 011 Distinct

 

Chemical Formula: CaSO4(H2O)

 

 

 
Term
 Definition

 

41 Barite:

 

Luster: Vitreous Glassy

 

Hardness: 3-3.5

 

Color: Dark/Light Brown, Yellow, Grayish

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 4.48

 

Cleavage/Fracture: 010 210 Perfect

 

Chemical Formula: BaSO4

 

 

 
Term

 

 

Luster: Vitreous Glassy

 

Hardness: 3-3.5

 

Color: Dark/Light Brown, Yellow, Grayish

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 4.48

 

Cleavage/Fracture: 010 210 Perfect

 


 

 

 

 Definition

 

41 Barite:

 

Chemical Formula: BaSO4

 

 

 
Term
Barite
 Definition

 

41 Barite:

 

Luster: Vitreous Glassy

 

Hardness: 3-3.5

 

Color: Dark/Light Brown, Yellow, Grayish

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 4.48

 

Cleavage/Fracture: 010 210 Perfect

 

Chemical Formula: BaSO4

 

 

 
Term
 Definition

 

42 Calcite:

 

Luster: Vitreous Glassy

 

Hardness: 3

 

Color: Any Color

 

Streak: White

 

Crystal System: Triagonal

 

Density: 2.71

 

Cleavage/Fracture: 1011 Perfect 

 

Chemical Formula: CaCO3

 

Other: HCl Reactive

 
Term

Luster: Vitreous Glassy

Hardness: 3

Color: Any Color

Streak: White

Crystal System: Triagonal

Density: 2.71

Cleavage/Fracture: 1011 Perfect 

Other: HCL reactive

 


 

 Definition

Calcite

 

 

 

 

 
Term
Calcite
 Definition

 

42 Calcite:

 

Luster: Vitreous Glassy

 

Hardness: 3

 

Color: Any Color

 

Streak: White

 

Crystal System: Triagonal

 

Density: 2.71

 

Cleavage/Fracture: 1011 Perfect 

 

Chemical Formula: CaCO3

 

Other: HCl Reactive

 
Term
 Definition

 

43 Dolomite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: White, Grey, Reddish, Brownish

 

Streak: White

 

Crystal System: Triagonal

 

Density: 2.84

 

Cleavage/Fracture: 1011 Perfect

 

Chemical Formula: CaMg(CO3)2

 

 

 

 

 

 

 
Term
Dolomite
 Definition

 

43 Dolomite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: White, Grey, Reddish, Brownish

 

Streak: White

 

Crystal System: Triagonal

 

Density: 2.84

 

Cleavage/Fracture: 1011 Perfect

 

Chemical Formula: CaMg(CO3)2

 

 

 

 

 

 

 
Term

 

43 Dolomite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: White, Grey, Reddish, Brownish

 

Streak: White

 

Crystal System: Triagonal

 

Density: 2.84

 

Cleavage/Fracture: 1011 Perfect

 

 

 

 

 

 

 

 Definition

Dolomite

 

 

 

Chemical Formula: CaMg(CO3)2

 

 

 

 

 

 

 
Term
 Definition

 

44 Siderite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5

 

Color: Yellowish, Brown, Grey, Green

 

Streak: White

 

Crystal System: Triagonal

 

Density: 3.96

 

Cleavage/Fracture: 1011 Perfect

 

Chemical Formula: FeCO3

 

 

 

 

 

 

 
Term

Siderite

 

 Definition

 

44 Siderite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5

 

Color: Yellowish, Brown, Grey, Green

 

Streak: White

 

Crystal System: Triagonal

 

Density: 3.96

 

Cleavage/Fracture: 1011 Perfect

 

Chemical Formula: FeCO3

 

 

 

 

 

 

 
Term

 

 

Luster: Vitreous Glassy

 

Hardness: 3.5

 

Color: Yellowish, Brown, Grey, Green

 

Streak: White

 

Crystal System: Triagonal

 

Density: 3.96

 

Cleavage/Fracture: 1011 Perfect

 


 

 

 

 

 

 

 

 Definition

Siderite

FeCO3
Term
 Definition

 

45 Witherite:

 

Luster: Vitreous Glassy

 

Hardness: 3-3.5

 

Color: Colorless, Brown, Yellow, Pale, White

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 4.3

 

Cleavage/Fracture: 010 Distinct 

 

Chemical Formula: BaCO3

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 3-3.5

 

Color: Colorless, Brown, Yellow, Pale, White

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 4.3

 

Cleavage/Fracture: 010 Distinct 

 


 

 Definition

Witherite

BaCO3
Term
Witherite
 Definition

 

45 Witherite:

 

Luster: Vitreous Glassy

 

Hardness: 3-3.5

 

Color: Colorless, Brown, Yellow, Pale, White

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 4.3

 

Cleavage/Fracture: 010 Distinct 

 

Chemical Formula: BaCO3

 
Term
 Definition

 

46 Rhodochrosite:

 

Luster: Vitreous Glassy

 

Hardness: 3

 

Color: Pinkish, Red, Rose, Yellow, Grey, Brown

 

Streak: White

 

Crystal System: Triagonal

 

Density: 3.69

 

Cleavage/Fracture: 1011 Perfect

 

Chemical Formula: MnCO3

 

 

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 3

 

Color: Pinkish, Red, Rose, Yellow, Grey, Brown

 

Streak: White

 

Crystal System: Triagonal

 

Density: 3.69

 

Cleavage/Fracture: 1011 Perfect

 


 

 

Definition

Rhodochrosite

MnCO3
Term
Rhodochrosite
 Definition

 

46 Rhodochrosite:

 

Luster: Vitreous Glassy

 

Hardness: 3

 

Color: Pinkish, Red, Rose, Yellow, Grey, Brown

 

Streak: White

 

Crystal System: Triagonal

 

Density: 3.69

 

Cleavage/Fracture: 1011 Perfect

 

Chemical Formula: MnCO3

 

 

 
Term
 Definition

 

47 Cerussite:

 

Luster: Adamantine

 

Hardness: 3-3.5

 

Color: Colorless, White, Grey, Blue, Green

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 6.58

 

Cleavage/Fracture: 110,021 Distinct

 

Chemical Formula: PbCO3

 

 

 

 

 

 

 
Term

 


 

Luster: Adamantine

 

Hardness: 3-3.5

 

Color: Colorless, White, Grey, Blue, Green

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 6.58

 

Cleavage/Fracture: 110,021 Distinct

 


 

 

 

 

 

 

 

 Definition

 

47 Cerussite:

 

Chemical Formula: PbCO3

 

 

 

 

 

 

 
Term
Cerussite
 Definition

47 Cerussite

Luster: Adamantine

 Hardness: 3-3.5

 Color: Colorless, White, Grey, Blue, Green

 Streak: White

 Crystal System: Orthorhombic

 Density: 6.58

 Cleavage/Fracture: 110,021 Distinct

 Chemical Formula: PbCO3
Term
 Definition

 

48 Arragonite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Colorless, White, Grey, Yellow, Reddish

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 2.93

 

Cleavage/Fracture: 010 Distinct 

 

Chemical Formula: CaCO3

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Colorless, White, Grey, Yellow, Reddish

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 2.93

 

Cleavage/Fracture: 010 Distinct 

 


 

 Definition

 

Arragonite

CaCO3

 
Term
Arragonite
 Definition

 

48 Arragonite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Colorless, White, Grey, Yellow, Reddish

 

Streak: White

 

Crystal System: Orthorhombic

 

Density: 2.93

 

Cleavage/Fracture: 010 Distinct 

 

Chemical Formula: CaCO3

 
Term
 Definition

 

49 Malachite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Green

 

Streak: Light Green

 

Crystal System: Monoclinic

 

Density: 3.8

 

Cleavage/Fracture: 201 Perfect 010 Fair

 

Chemical Formula: Cu2(CO3)(OH2)

 

 

 

 

 

 

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Green

 

Streak: Light Green

 

Crystal System: Monoclinic

 

Density: 3.8

 

Cleavage/Fracture: 201 Perfect 010 Fair

 


 

 

 

 

 

 

 

 Definition

Malachite

 
Term
Malachite
 Definition

 

49 Malachite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Green

 

Streak: Light Green

 

Crystal System: Monoclinic

 

Density: 3.8

 

Cleavage/Fracture: 201 Perfect 010 Fair

 

Chemical Formula: Cu2(CO3)(OH2)

 

 

 

 

 

 

 
Term
 Definition

 

50 Azurite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Blue

 

Streak: Light Blue

 

Crystal System: Monoclinic

 

Density: 3.83

 

Cleavage/Fracture: 011 Perfect 100 Fair

 

Chemical Formula: Cu3(CO3)(OH)2

 

 

 

 

 

 

 
Term

 


 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Blue

 

Streak: Light Blue

 

Crystal System: Monoclinic

 

Density: 3.83

 

Cleavage/Fracture: 011 Perfect 100 Fair

 


 

 

 

 

 

 

 

 Definition

 

Azurite

 

 

 

 

 

 

 
Term
Azurite
 Definition

 

50 Azurite:

 

Luster: Vitreous Glassy

 

Hardness: 3.5-4

 

Color: Blue

 

Streak: Light Blue

 

Crystal System: Monoclinic

 

Density: 3.83

 

Cleavage/Fracture: 011 Perfect 100 Fair

 

Chemical Formula: Cu3(CO3)(OH)2

 

 

 

 

 

 

 
Term
 Definition

 

51 Borax:

 

Luster: Greasy Oily

 

Hardness: 2-2.5

 

Color: Blue, Green, Grey, Colorless, White

 

Streak: White

 

Crystal System: Monoclinic

 

Density: 1.71

 

Cleavage/Fracture: 100 110 Perfect 

 

Chemical Formula: Na2B4O5(OH)4 dot 8(H2O)

 

 

 

 

 
Term

 Luster: Greasy Oily

Hardness: 2-2.5

Color: Blue, Green, Grey, Colorless, White

Streak: White

Crystal System: Monoclinic

Density: 1.71

Cleavage/Fracture: 100 110 Perfect 

 

 Definition

Borax

 
Term
Borax
 Definition

 

51 Borax:

 

Luster: Greasy Oily

 

Hardness: 2-2.5

 

Color: Blue, Green, Grey, Colorless, White

 

Streak: White

 

Crystal System: Monoclinic

 

Density: 1.71

 

Cleavage/Fracture: 100 110 Perfect 

 

Chemical Formula: Na2B4O5(OH)4 dot 8(H2O)

 

 

 

 

 
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