Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
2.97-3.142.93-2.96
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Subconchoidal, Conchoidal
Cleavage
{1011} Indistinct
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
-99993.5-4
2
10
👆🏻
Chemical Composition
Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references