Augite’s Physical Properties

1. Color: dark green, black, brown
2. Streak: white, gray, very pale green
3. Luster: Vitreous on cleavage and crystal faces; Dull on other surfaces
4. Cleavage/Fracture: 2 cleavage planes intersecting at angles of slightly less than 90 degrees
5. Hardness: 5.5-6
6. Specific Gravity: 3.2-3.6
7. Tenacity: Brittle
8. Texture: Gritty