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9 Cards in this Set
- Front
- Back
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What is geologic definition of a mineral?
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Naturally occuring solid, formed geologically
Has crystal structure specific chemical composition inorganic ordered atom arrangement |
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What are rocks?
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Earth materials made from minerals.
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What are 3 main rock types?
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Igneous (solidified from molten rock)
Sedimentary (cemented/precipitated from rock fragments) Metamorphic (rock changed by temp and pressure) |
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What are common properties of minerals?
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Color
Streak Luster (way mineral scatters light) hardness (scratching resistance) Specific gravity Crystal habit (ideal shape of crystal faces) crystal form fracture cleavage |
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What are different types of crystal form?
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Euhedral: good faces
anhedral: no faces subhedral: between the two |
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What is mineral fracture?
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Lacking planes of weakness
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What is mineral cleavage?
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Tendency to break along planes of weakness.
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How are minerals classified?
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By their mineral group.
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What are silicate minerals?
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Dominate Earth's crust, are rock forming minerals.
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