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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: Plagioclase Feldspar |
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Class: SILICATES Group: Tektosilicates (framework silicates) |
Color
white, gray, or black |
Chemical Formula: NaCaAlSi3O8 |
Streak
white |
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Luster
glassy |
Hardness
6 |
Cleavage
2 directions at almost 90° |
Density
2.6 - 2.8 |
Crystal Form
Triclinic |
Common Uses / Other Facts: Used in the porcelain industry. Composition ranges from NaAlSi3O8 (Albite) to CaAl2Si2O8 (Anorthite). |
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Sulfides and Sulfates |
Halides |
Organic |
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