Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.723.85-3.94
1
7.18
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Fracture
-
Conchoidal, Uneven
Cleavage
{110} Perfect, {010} Perfect
{010} Good, {100} Distinct
Mohs Hardness
5-65-5.5
2
10
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Chemical Composition
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)