Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.40-2.422.69-2.79
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
Poor on {0001}
Mohs Hardness
4.55.5-6.5
2
10
👆🏻
Chemical Composition
Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references