1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Partially soluble in water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
ConchoidalWalter Schumann, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Not Available
1.6 Cleavage
Perfect on {010}, good on {100}
Perfect on {10 1 0}
1.7 Mohs Hardness
1.8 Chemical Composition
Be 2BO 3(OH)Ulrich Henn and Claudio C.
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)