Tenacity
-
Sectile
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.43-3.446.13
1
7.18
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Fracture
-
Conchoidal
Cleavage
None Observed
Distinct on {001} and {110}, indistinct on {100}
Mohs Hardness
6.5-72-3
2
10
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Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references