Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.40-2.422.79-2.87
1
7.18
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Fracture
-
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Mohs Hardness
4.55.5-6
2
10
👆🏻
Chemical Composition
Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references