1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Poorly soluble in dilute HCl
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.90-3.142.80-2.95
1
7.18
1.5 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Imperfect; basal
Perfect on {10 1 1}, rhombohedral cleavage
1.7 Mohs Hardness
1.8 Chemical Composition
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references