Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.725.85-6.15
1
7.18
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Fracture
-
Conchoidal
Cleavage
{110} Perfect, {010} Perfect
Fair in four directions forming octahedrons
Mohs Hardness
5-63.5-4
2
10
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Chemical Composition
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references