1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.4 Durability
Not Available
Not Available
1.7 Specific Gravity
1.16 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Uneven, Gems, Sixth Edition (2006)
1.17 Cleavage
None
Perfect [001] good [010] poor [110]
1.18 Mohs Hardness
1.19 Chemical Composition
Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)