Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.85-6.152.72
1
7.18
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Fracture
Conchoidal
-
Cleavage
Fair in four directions forming octahedrons
{110} Perfect, {010} Perfect
Mohs Hardness
3.5-45-6
2
10
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Chemical Composition
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)