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Geology Lab
Charles Jones
23
Geology
Undergraduate 2
09/07/2021

Additional Geology Flashcards

 


 

Cards

Term
3 properties that define a mineral
Definition

1) Naturally occurring

2) Definite chemical composition

3) Particular atomic structure

 

*composition and architecture determine the physical properties

Term
Is color one of the more reliable properties used to identify minerals? Why or why not?
Definition
No because impurities/defects within the crystal structure can affect the color
Term

Luster? 

[image]

Definition
Metallic because it looks like an opaque metal
Term

Luster? 

[image]

Definition
Vitreous because it's transparent and reflective
Term

Luster? 

[image]

Definition
Dull because of the weak reflection of light and earthiness
Term

Luster?

[image]

Definition
Pearly like the inside of a clam shell
Term
Hardness of a fingernail
Definition
2.5
Term
Hardness of a copper penny
Definition
3.5 (must be 1982 or older)
Term
Hardness of glass
Definition
5.5
Term
Minerals softer than fingernails (and their hardness)
Definition

1) Gypsum = 2

2) Talc = 1

Term
Hardness of calcite
Definition
3 (can't scratch glass/steel)
Term
Hardness of quartz
Definition
7 (can scratch glass and steel)
Term
Hardest mineral and its hardness
Definition
Diamond = 10
Term
Streak is most useful for identifying minerals with which type of luster?
Definition
Metallic
Term

Cleavage?

[image]

Definition
1
Term

Cleavage?

[image]

Definition

2

[image]

Term

Cleavage?

[image]

Definition

3

[image]

Term

Cleavage planes?

[image]

Definition
4
Term
How do you recognize cleavage planes in samples with poorly displayed cleavages?
Definition
Look for small flashes of light
Term

Striations (plagioclase) or veinlets (feldspar)?

[image]

Definition
Striations in plagioclase
Term

Striations (plagioclase) or veinlets (feldspar)?

[image]

Definition
Veinlets (feldspar)
Term
Which 2 minerals feel soapy/slippery?
Definition
Talc and Serpentine
Term
What can smell reveal about a mineral? How do you determine smell?
Definition
?
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