Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.612.90-3.10
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
{001} Perfect, {010} Good
Poor/indistinct on {1120} and {1011}
Mohs Hardness
67
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references