Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.76-3.77
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
-
Cleavage
Absent
{110} Perfect, {110} Perfect
Mohs Hardness
6.5-75-6
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.