Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
3.97-4.05
1.77
Fracture
Conchoidal
Not Available
Cleavage
No true cleavage
Perfect on {10 1 0}
Mohs Hardness
9
2-2.5
Chemical Composition
Al 2 O 3
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
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