Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.7-3.92.90-3.10
1
7.18
👆🏻
Fracture
Conchoidal
Splintery, Granular
Cleavage
{001} perfect; {111} imperfect, may exhibit parting on , {011}
None
Mohs Hardness
5.5-66-6.5
2
10
👆🏻
Chemical Composition
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references