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
Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
Not Available
1.6 Cleavage
Distinct on {110}, imperfect on {010}, poor on {001}
Perfect on {10 1 0}
1.7 Mohs Hardness
1.8 Chemical Composition
BeAl 2 O 4
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)