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Mineralogy Diagnostic 1
Non-Silicate Exam Diagnostic Properties
35
Geology
Undergraduate 3
10/12/2017

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Cards

Term

Hematite

Fe2O3

Definition

high specific gravity

red-brown streak

Term

Bauxite

Al(OH)3

Definition
pisolitic habit
Term

Magnetite

Fe3O4

Definition

very magnetic

black streak

Term

Corundum

Al2O3

Definition

hardness = 9

hexagonal habit

Term

Limonite

FeOOH*nH2O

Definition

yellow-brown streak

earthy luster

Term

Cassiterite

SnO2

Definition

high specific gravity

distinctive brown color

possible tetragonal prisms

Term

Fluorite

CaF2

Definition

hardness = 4

octahedral cleavage

Term

Goethite

FeOOH

Definition

brown streak

hardness = 5-5.5

botryoidal habit

Term

Chromite

FeCr2O4

Definition
brown streak
Term

Ilmenite

FeTiO3

Definition

black streak

platy habit

weak magnetism

Term

Halite

NaCl

Definition

salty taste

cubic cleavage

Term

Cinnabar

HgS

Definition

red streak

hardness = 2-2.5

Term

Pyrite

FeS2

Definition

isometric

metallic gold color

green-black streak

Term

Molybdenite

MoS2

Definition

basal cleavage

hardness = 1-1.5

Term

Copper

Cu

Definition

hackly fracture

penny colored

Term

Chalcopyrite

CuFeS2

Definition

tarnish

yellow colored gold

tetragonal

Term

Chalcocite

Cu2S

Definition

black sooty tarnish

hardness = 2.5-3

Term

Sulfur

S

Definition

smells like ass

yellow vitreous luster

Term

Sphalerite

ZnS

Definition

basal cleavage

brown/yellow streak

Term

Graphite

C

Definition

hardness = 1-2

resinous luster

Term

Galena

PbS

Definition

cubic cleavage

high specific gravity

steel gray streak

Term

Arsenopyrite

FeAsS

Definition

garlic odor when crushed

prismatic habit

Term

Pyrrhotite

Fe1-xS

Definition

bronze color

softer than pyrite 3.5-4.5

Term

Azurite

Cu3(CO3)2(OH)

Definition

blue color

blue streak

effervesces

Term

Anhydrite

CaSO4

Definition

cubic cleavage

hardness = 3-3.5

Term

Siderite

FeCO3

Definition

effervesces (powdered)

high specific gravity

brownish color

Term

Aragonite

CaCO3

Definition

effervesces vigorously

denser than calcite

Term

Malachite

Cu2CO3(OH)2

Definition

green color

green streak

effervesces

Term

Dolomite

CaMg(CO3)2

Definition

effervesces (powdered)

hardness = 3.5-4

Term

Calcite

CaCO3

Definition

effervesces

hardness = 3

rhombohedral cleavage

Term

Rhodochrosite

MnCO3

Definition

pink to red color

effervesces (powdered)

rhombohedral cleavage

Term

Witherite

BaCO3

Definition

effervesces vigorously

higher specific gravity than aragonite

Term

Apatite

Ca5(PO4)3(OH,F,Cl)

Definition

adamantine luster

hexagonal crystals

hardness = 5

Term

Gypsum

CaSO4*2H2O

Definition

hardness = 2

fibrous texture

Term

Barite

BaSO4

Definition

high specific gravity

tabular crystals

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