Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.103.95-4.10
1
7.18
👆🏻
Fracture
Splintery, Granular
Uneven
Cleavage
None
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
6-6.53.5-4
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references