Term
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Definition
Olivine
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: None
Cleavage: None (Irregular Fracture)
Other: Olive Green
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Term
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Definition
Augite
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: None
Cleavage: 2-Directional
Other: Black |
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Term
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Definition
Hornblende
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: Brownish-Black
Cleavage: 2-Directional (Not at 90°)
Other: Black |
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Term
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Definition
Mica
Luster: Non-Metallic
Hardness: Between 5.5 and 2.2
Streak: None
Cleavage: Single (180º)
Other: Flaky |
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Term
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Definition
Anorthite
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: Gray
Cleavage: 2-Directional
Other: Dull Black |
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Term
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Definition
Albite
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: None
Cleavage: 2-Directional (at 90°)
Other: Marble-like |
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Term
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Definition
Orthoclase
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: None
Cleavage: 2-Directional
Other: Peach |
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Term
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Definition
Muscovite
Luster: Non-Metallic
Hardness: Between 2.2 and 5.5
Streak: None
Cleavage: Single (180°)
Other: Glassy |
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Term
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Definition
Smoky Quartz
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: None
Cleavage: Conchoidal Fracture
Other: ---- |
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Term
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Definition
Milky Quartz
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: None
Cleavage: Conchoidal Fracture
Other: ---- |
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Term
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Definition
Agate
Luster: Non-Metallic
Hardness: Greater than 5.5
Streak: None
Cleavage: Conchoidal Fracture
Other: ---- |
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Term
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Definition
Calcite
Luster: Non-Metallic
Hardness: Between 2.2 and 5.5
Streak: White
Cleavage: 3-Directional (not at 90°)
Other: Reacts with acid |
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