Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.552.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
None, but may exhibit slight parting
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
7.5-86-6.5
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)