Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.103.07-3.13
1
7.18
👆🏻
Fracture
Splintery, Granular
Conchoidal, Uneven
Cleavage
None
{100} Perfect, {010} Distinct, {102} Distinct
Mohs Hardness
6-6.53-3.5
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references