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Augite
Augite
Mineral Properties and Uses
What is Augite?
Augite is a rock-forming silicate mineral of the pyroxene group. It is an important mineral in many basic igneous rocks.
Physical Properties of Augite |
| Uses |
No significant commercial uses of augite |
| Color |
dark green to black |
| Streak |
white to gray, augite can be slightly harder than a streak plate so brittle fragments rather than a powder will sometimes be produced |
| Luster |
vitreous |
| Diaphaneity |
translucent to opaque |
| Cleavage |
prismatic |
| Mohs Hardness |
5.5 - 6 |
| Specific Gravity |
3.2 - 3.6 |
| Distinguishing Characteristics |
two cleavage directions almost at right angles, dark green to black color |
| Chemical Composition |
a complex silicate - (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6 |
| Crystal System |
monoclinic |
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