Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.102.24-2.29
1
7.18
👆🏻
Fracture
Splintery, Granular
Uneven, Subconchoidal, Conchoidal
Cleavage
None
Very poor [100]
Mohs Hardness
6-6.55-5.5
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references