Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.642.24-2.29
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven, Subconchoidal, Conchoidal
Cleavage
Absent
Very poor [100]
Mohs Hardness
6.5-75-5.5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references