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Mineral
Identification by Picture and Attribute
Explorers! Before you begin your journey, you need to recognize these geological specimens. |
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Begin by selecting one of the specimens pictured. |
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Inosilicates, Neosilicates, Sorosilicates |
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Oxides, Hydroxides, Carbonates |
Silicates |
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Name: Amphibole |
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Class: SILICATES Subclass: Inosilicates (chain silicates) |
Color
green - black |
Chemical Formula: Ca2(Mg, Fe)4 Al(Si7Al)O22(OH, F)2 |
Streak
pale green |
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Luster
glassy |
Hardness
5 - 6 |
Cleavage
2 directions Not 90o (Prismatic) |
Density
3 - 3.4 |
Crystal Form
Monoclinic |
Common Uses / Other Facts:
Crystal surface often striaped due to long parallel fractures along cleavage frames |
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Sulfides and Sulfates |
Halides |
Organic |
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