Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.393.76-3.77
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
{110} Perfect, {110} Perfect
Mohs Hardness
7.5-85-6
2
10
👆🏻
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.