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Sapphire
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Hexagonite
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Summary
Astrology
Physical Properties
Optical Properties
Benefits
All
Physical Properties
Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
-
insoluble
-
3.95-4.03
Uneven
None, but may exhibit parting
9
Al
2
O
3
Brittle
-
-
2.98-3.03
Uneven
[110] perfect; [010] distinct
5-6
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
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