Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.30-2.603.87-4.14
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Subconchoidal, Conchoidal
Cleavage
{111} Imperfect
Poor on {120}, in traces on {001}
Mohs Hardness
5.5-65.5-6
2
10
👆🏻
Chemical Composition
Na 4AlBeSi 4O 12ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references