Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.102.44-2.62
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
Indiscernible
Mohs Hardness
3.5-42.5-5.5
2
10
👆🏻
Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
H 4Mg 3Si 2O 9Walter Schumann , Gemstones of the world (2001) More from other references