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Sillimanite
Sillimanite
Mineral Properties and Uses
Physical Properties of Sillimanite |
| Uses |
no significant commercial use |
| Color |
colorless, white, yellow, brown, blue, green |
| Streak |
colorless |
| Luster |
vitreous |
| Diaphaneity |
transparent to translucent |
| Cleavage |
perfect |
| Mohs Hardness |
6.5 - 7.5 |
| Specific Gravity |
3.2 - 3.3 |
| Distinguishing Characteristics |
slender crystals, fibrous habit |
| Crystal System |
orthorhombic |
| Sillimanite with magnetite from Benson Mines, New York. Specimen is approximately 4 inches (10 centimeters) across. |
| Sillimanite from Williamstown, South Australia. Specimen is approximately 4 inches (10 centimeters) across. |
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| Sillimanite with magnetite from Benson Mines, New York. Specimen is approximately 4 inches (10 centimeters) across. |
| Sillimanite from Dillon, Montana. Specimen is approximately 4 inches (10 centimeters) across. |
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