Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.97-3.145.9-6.3
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal, Uneven
Cleavage
{1011} Indistinct
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
-99994.5-5
2
10
👆🏻
Chemical Composition
Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references