Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.03-3.185.35
1
7.18
👆🏻
Fracture
Uneven, Irregular, Conchoidal
Conchoidal
Cleavage
{???} Indistinct
Perfect on {100}, imperfect on {001}
Mohs Hardness
7-7.52.5
2
10
👆🏻
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)