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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: Corundum |
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Class: OXIDES |
Color
highly variable |
Chemical Formula: Al2O3 |
Streak
none |
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Luster
glassy |
Hardness
9 |
Cleavage
none |
Density
3.9 - 4.1 |
Crystal Form
Trigonal/Hexagonal |
Common Uses / Other Facts: Red = Ruby; Blue = Sapphire |
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Sulfides and Sulfates |
Halides |
Organic |
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