Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.102.90-3.10
1
7.18
👆🏻
Fracture
Uneven
Splintery, Granular
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
None
Mohs Hardness
3.5-46-6.5
2
10
👆🏻
Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references