Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.784.32-4.48
1
7.18
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Fracture
Conchoidal
Uneven, Subconchoidal, Conchoidal
Cleavage
Good in three directions
{101}, good; {010}, poor
Mohs Hardness
5-63.5
2
10
👆🏻
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)