Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
1.98-2.501.98-2.25
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
None
None
Mohs Hardness
5.5-6.55-6.5
2
10
👆🏻
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
SiO 2 + H 2OUlrich Henn and Claudio C.