Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.553.05-3.08
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Uneven, Conchoidal
Cleavage
None, but may exhibit slight parting
Poor on {100}
Mohs Hardness
7.5-85
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)