Tenacity
-
-
Solubility
Insoluble in acids
-
Durability
-
-
Specific Gravity
4.20-4.302.25-2.40
1
7.18
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Fracture
Uneven, Conchoidal
-
Cleavage
{110} good, 100 moderate, parting on {092} and {011}
perfect on {010}; good on {100}
Mohs Hardness
6-6.55-5.5
2
10
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Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references