Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.64-2.691.65-1.99
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
None
{010} Perfect, {110} Perfect
Mohs Hardness
72-2.5
2
10
👆🏻
Chemical Composition
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)