Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.553.25
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
None, but may exhibit slight parting
Imperfect in one direction
Mohs Hardness
7.5-85-5.5
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)