1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Not Available
1.6 Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe) 2Si 2O 6Ulrich Henn and Claudio C.