1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.34-3.443.17-3.18
1
7.18
2.2 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Not Available
2.3 Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Not Available
2.6 Mohs Hardness
2.8 Chemical Composition
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 5(PO 4) 3ClAnthony et al , Handbook of mineralogy (2001)