Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.23-3.26
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Conchoidal
Cleavage
Absent
Perfect on {010} imperfect on {100}
Mohs Hardness
6.5-76.5-7
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)