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Sillimanite
Sillimanite - Mineral Properties and Uses |
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Uses |
Sillimanite uses include: no significant commercial use. |
Color |
colorless, white, yellow, brown, blue, green |
Streak |
colorless |
Luster |
vitreous |
Diaphaneity |
transparent to translucent |
Cleavage |
perfect |
Hardness |
6.5 - 7.5 |
Specific Gravity |
3.2 - 3.3 |
Distinguishing
Characteristics |
slender crystals, fibrous habit |
Crystal System |
orthorhombic |
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Sillimanite with magnetite from Benson Mines, New York.
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.
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Sillimanite from Williamstown, South Australia.
Specimen is approximately 4 inches (10 centimeters) across.
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Sillimanite from Dillon, Montana.
Specimen is approximately 4 inches (10 centimeters) across.
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Mineral photographs that appear on this page with a Geology.com copyright mark are property of Geology.com and may not be used beyond our website. If you like these photos and would like to share them with others please link to this page or email its URL. The photos were taken and composed by Ann Bryant.
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