1 Physical Properties
1.1 Tenacity
1.4 Solubility
Nearly insoluble in HCl and HNO3
Not Available
1.7 Durability
Not Available
Not Available
1.9 Specific Gravity
1.10 Fracture
Conchoidal, Brittle
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.11 Cleavage
1.12 Mohs Hardness
1.13 Chemical Composition
Not Available
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references