Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.521.98-2.50
1
7.18
👆🏻
Fracture
-
ConchoidalWalter Schumann
Cleavage
{100} Perfect, {001} Perfect
None
Mohs Hardness
5-5.55.5-6.5
2
10
👆🏻
Chemical Composition
Na(Mn2+ ,Ca) 2Si 3O 8(OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)