Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.08-3.122.25-2.40
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
-
Cleavage
{010} Perfect
perfect on {010}; good on {100}
Mohs Hardness
7.55-5.5
2
10
👆🏻
Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references