Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.825.90-6.10
1
7.18
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Fracture
-
Conchoidal
Cleavage
Perfect in one direction, indistinct in one direction
{110} Distinct, {001} Indistinct, {100} Indistinct
Mohs Hardness
62.5-3
2
10
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Chemical Composition
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]
PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references