Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.553.76-3.77
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
None, but may exhibit slight parting
{110} Perfect, {110} Perfect
Mohs Hardness
7.5-85-6
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.