Minerals Quiz GEOL 110L

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21 Terms

1

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Galena

SG is heavy
Between glass and fingernail
3D rhombohedral cleavage
Metallic gray streak
Shiny, metallic gray

<ul><li><p>SG is heavy</p></li><li><p>Between glass and fingernail</p></li><li><p>3D rhombohedral cleavage</p></li><li><p>Metallic gray streak</p></li><li><p>Shiny, metallic gray</p></li></ul><p></p>

2

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Halite

Betweeen glass and fingernail
3D rhombohedral cleavage
No streak
Glassy, transparent, any color tint

<p></p><ul><li><p>Betweeen glass and fingernail</p></li><li><p>3D rhombohedral cleavage</p></li><li><p>No streak</p></li><li><p>Glassy, transparent, any color tint</p></li></ul><p></p>

3

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Olivine

Harder than glass
No cleavage
No streak
Sparkly green

<p></p><ul><li><p>Harder than glass</p></li><li><p>No cleavage</p></li><li><p>No streak</p></li><li><p>Sparkly green</p></li></ul><p></p>

4

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Muscovite

Flexible in thin sheets
Softer than fingernail, flakes off
1D basal cleavage, can peel apart
Orangish-white streak
Pearly, clear/brown but can be any color

<ul><li><p>Flexible in thin sheets</p></li><li><p>Softer than fingernail, flakes off</p></li><li><p>1D basal cleavage, can peel apart</p></li><li><p>Orangish-white streak</p></li><li><p>Pearly, clear/brown but can be any color</p></li></ul><p></p>

5

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Calcium plagioclase feldspar

Striations, DARK
SG is pretty light
Harder than glass
2D prismatic parallelogram cleavage
No streak
Glassy, metallic dark gray

<ul><li><p>Striations, DARK</p></li><li><p>SG is pretty light</p></li><li><p>Harder than glass</p></li><li><p>2D prismatic parallelogram cleavage</p></li><li><p>No streak</p></li><li><p>Glassy, metallic dark gray</p></li></ul><p></p>

6

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Garnet

Harder than glass
No cleavage
Red-yellow-brown streak
Glassy, red but can be any color

<ul><li><p>Harder than glass</p></li><li><p>No cleavage</p></li><li><p>Red-yellow-brown streak</p></li><li><p>Glassy, red but can be any color</p></li></ul><p></p>

7

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Graphite

Pencil filling

Softer than fingernail
No cleavage
Metallic gray streak
Shiny, metallic gray

<ul><li><p>Pencil filling</p></li></ul><ul><li><p>Softer than fingernail</p></li><li><p>No cleavage</p></li><li><p>Metallic gray streak</p></li><li><p>Shiny, metallic gray</p></li></ul><p></p>

8

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Quartz

Harder than glass
No cleavage
No streak
Sparkly or glassy, transparent and can be any color

<p></p><ul><li><p>Harder than glass</p></li><li><p>No cleavage</p></li><li><p>No streak</p></li><li><p>Sparkly or glassy, transparent and can be any color</p></li></ul><p></p>

9

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Pyrite

Harder than glass

No cleavage
Black streak
Sparkly, metallic gold

<ul><li><p>Harder than glass</p></li></ul><ul><li><p>No cleavage</p></li><li><p>Black streak</p></li><li><p>Sparkly, metallic gold</p></li></ul><p></p>

10

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Biotite

Flexible in thin sheets
Between glass and fingernail
1D basal cleavage
No streak
Glassy, green-brown-black

<ul><li><p>Flexible in thin sheets</p></li><li><p>Between glass and fingernail</p></li><li><p>1D basal cleavage</p></li><li><p>No streak</p></li><li><p>Glassy, green-brown-black</p></li></ul><p></p>

11

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Sodium plagioclase feldspar

Striations, LIGHT
Harder than glass
2D prismatic parallelogram cleavage
No streak
Dull, bit sparkly, white-gray

<ul><li><p>Striations, LIGHT</p></li><li><p>Harder than glass</p></li><li><p>2D prismatic parallelogram cleavage</p></li><li><p>No streak</p></li><li><p>Dull, bit sparkly, white-gray</p></li></ul><p></p>

12

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Amphibole

Harder than glass

No cleavage
Gray-green streak
Shiny, black or white or green

<ul><li><p>Harder than glass</p></li></ul><ul><li><p>No cleavage</p></li><li><p>Gray-green streak</p></li><li><p>Shiny, black or white or green</p></li></ul><p></p>

13

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Magnetite

Attracted to magnet
Harder than glass
No cleavage
No streak
Dull, bit sparkly, black but rusts orange

<ul><li><p>Attracted to magnet</p></li><li><p>Harder than glass</p></li><li><p>No cleavage</p></li><li><p>No streak</p></li><li><p>Dull, bit sparkly, black but rusts orange</p></li></ul><p></p>

14

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Pyroxene

Harder than glass
2D prismatic parallelogram cleavage
No streak
Dull, green-black

<p></p><ul><li><p>Harder than glass</p></li><li><p>2D prismatic parallelogram cleavage</p></li><li><p>No streak</p></li><li><p>Dull, green-black</p></li></ul><p></p>

15

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Kaolinite

Softer than fingernail
No cleavage
White streak
Dull, white/tan

<p></p><ul><li><p>Softer than fingernail</p></li><li><p>No cleavage</p></li><li><p>White streak</p></li><li><p>Dull, white/tan</p></li></ul><p></p>

16

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Potassium feldspar

Harder than glass
2D prismatic parallelogram cleavage
Pearly, orange-pink-brown

<p></p><ul><li><p>Harder than glass</p></li><li><p>2D prismatic parallelogram cleavage</p></li><li><p>Pearly, orange-pink-brown</p></li></ul><p></p>

17

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Hematite

Round bumps
Harder than glass
No cleavage
Red streak
Dull OR sparkly, red-brown-gray

<ul><li><p>Round bumps</p></li><li><p>Harder than glass</p></li><li><p>No cleavage</p></li><li><p>Red streak</p></li><li><p>Dull OR sparkly, red-brown-gray</p></li></ul><p></p>

18

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Calcite

Acid reaction, fizzes at HCl
Between glass and fingernail
3D rhombohedral cleavage
White streak
Glassy, translucent but can be any color

<ul><li><p>Acid reaction, fizzes at HCl</p></li><li><p>Between glass and fingernail</p></li><li><p>3D rhombohedral cleavage</p></li><li><p>White streak</p></li><li><p>Glassy, translucent but can be any color</p></li></ul><p></p>

19

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Talc

Softer than fingernail
No cleavage
White streak
Pearly, white

<p></p><ul><li><p>Softer than fingernail</p></li><li><p>No cleavage</p></li><li><p>White streak</p></li><li><p>Pearly, white</p></li></ul><p></p>

20

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Gypsum

Softer than fingernail
1D basal cleavage
No streak
Glassy/pearly, clear

<p></p><ul><li><p>Softer than fingernail</p></li><li><p>1D basal cleavage</p></li><li><p>No streak</p></li><li><p>Glassy/pearly, clear</p></li></ul><p></p>

21

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Dolomite

Between glass and fingernail
3D rhombohedral cleavage
White streak
Sparkly, white-gray

<p></p><p></p><ul><li><p>Between glass and fingernail</p></li><li><p>3D rhombohedral cleavage</p></li><li><p>White streak</p></li><li><p>Sparkly, white-gray</p></li></ul><p></p>