Tenacity
-
Sectile
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.826.13
1
7.18
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Fracture
-
Conchoidal
Cleavage
Perfect in one direction, indistinct in one direction
Distinct on {001} and {110}, indistinct on {100}
Mohs Hardness
62-3
2
10
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Chemical Composition
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references