Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.43-3.443.40-4.20
1
7.18
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Fracture
-
-
Cleavage
None Observed
Indistinct
Mohs Hardness
6.5-7-9999
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca(Ce,La,Y,Ca)Al2(Fe,Al)Si3O12(OH)