GEOL Lab - Midterm Exam (Non-Silicate Minerals)

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Last updated 10:27 PM on 3/17/26
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16 Terms

1
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<ul><li><p>Greasy to the touch</p></li><li><p>Marks on paper</p></li></ul><p></p>

  • Greasy to the touch

  • Marks on paper

Graphite

2
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<ul><li><p>Feels very heavy</p></li><li><p>Cubic cleavage</p></li></ul><p></p>

  • Feels very heavy

  • Cubic cleavage

Galena

3
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<ul><li><p>Reddish-brown color is common</p></li><li><p>Reddish-brown streak</p></li><li><p>Very soft hardness</p></li></ul><p></p>

  • Reddish-brown color is common

  • Reddish-brown streak

  • Very soft hardness

Hematite

4
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<ul><li><p>Yellow-brown color common</p></li><li><p>Yellow-brown streak</p></li><li><p>Very soft hardness</p></li></ul><p></p>

  • Yellow-brown color common

  • Yellow-brown streak

  • Very soft hardness

Limonite

5
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<ul><li><p>Metallic copper color</p></li><li><p>Common green tarnish</p></li></ul><p></p>

  • Metallic copper color

  • Common green tarnish

Native Copper

6
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<ul><li><p>Strong sulfur odor</p></li><li><p>Light brown streak &amp; brown to black in color</p></li></ul><p></p>

  • Strong sulfur odor

  • Light brown streak & brown to black in color

Sphalerite

7
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<ul><li><p>Brass yellow that is often tarnished to bronze</p></li><li><p>Black streak with a green tint</p></li></ul><p></p>

  • Brass yellow that is often tarnished to bronze

  • Black streak with a green tint

Chalcopyrite

8
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<ul><li><p>Black color with a granular appearance</p></li><li><p>Sticks to a magnet</p></li></ul><p></p>

  • Black color with a granular appearance

  • Sticks to a magnet

Magnetite

9
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<ul><li><p>Shiny brass-yellow color</p></li><li><p>Often has cubic crystals</p></li><li><p>Black streak</p></li></ul><p></p>

  • Shiny brass-yellow color

  • Often has cubic crystals

  • Black streak

Pyrite

10
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<ul><li><p>Yellow to yellow-brown color</p></li><li><p>Strong sulfur smell</p></li></ul><p></p>

  • Yellow to yellow-brown color

  • Strong sulfur smell

Sulfur

11
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<ul><li><p>Clear when pure</p></li><li><p>Basal cleavage with thin edges that are slightly flexible</p></li><li><p>Often feels smooth and chalky</p></li><li><p>Can easily be scratched by fingernail</p></li></ul><p></p>

  • Clear when pure

  • Basal cleavage with thin edges that are slightly flexible

  • Often feels smooth and chalky

  • Can easily be scratched by fingernail

Gypsum

12
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<ul><li><p>Cubic cleavage</p></li><li><p>Clear when pure</p></li><li><p>Salty taste</p></li><li><p>Can be scratched by fingernail</p></li></ul><p></p>

  • Cubic cleavage

  • Clear when pure

  • Salty taste

  • Can be scratched by fingernail

Halite

13
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<ul><li><p>Cannot be scratched by fingernail</p></li><li><p>Clear when pure</p></li></ul><p></p>

  • Cannot be scratched by fingernail

  • Clear when pure

Calcite

14
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<ul><li><p>A common color is light green</p></li><li><p>Clear when pure</p></li></ul><p></p>

  • A common color is light green

  • Clear when pure

Fluorite

15
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<ul><li><p>Commonly green or brownish in color</p></li><li><p>Hardness of 5</p></li><li><p>Brittle and breaks easily</p></li></ul><p></p>

  • Commonly green or brownish in color

  • Hardness of 5

  • Brittle and breaks easily

Apatite

16
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<ul><li><p>Commonly brown or gray in color</p></li><li><p>Very hard; only non-silicate mineral that cannot be scratched with a steel nail</p></li></ul><p></p>

  • Commonly brown or gray in color

  • Very hard; only non-silicate mineral that cannot be scratched with a steel nail

Corundum