Tenacity
-
-
Solubility
-
Insoluble in acids
Durability
-
-
Specific Gravity
3.03-3.184.20-4.30
1
7.18
👆🏻
Fracture
Uneven, Irregular, Conchoidal
Uneven, Conchoidal
Cleavage
{???} Indistinct
{110} good, 100 moderate, parting on {092} and {011}
Mohs Hardness
7-7.56-6.5
2
10
👆🏻
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)