| Sample # |
10 |
| Mineral
Name |
AMPHIBOLE (Hornblende) |
| Chemical Composition |
(Ca,Mg,Fe,Na,K,Al)7(Si,Al8)022(OH)2 |
| Luster |
Vitreous
to silky |
| Color(s) |
Black,
green |
| Streak Color |
White to grey or greenish black to black |
| Specifc Gravity |
3-3.4 |
| Habit |
Prismatic,
tabular, massive |
| Cleavage/Fracture |
2 good (124˚ & 56˚) |
| Hardness |
5-6 |
| Diagnostic Feature(s) | Cleavage angle, habit |
