Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
1.98-2.502.51-2.63
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
None
Perfect
Mohs Hardness
5.5-6.54
2
10
👆🏻
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)