1 Physical Properties
1.3 Tenacity
1.5 Solubility
1.7 Durability
Not Available
Not Available
1.8 Specific Gravity
1.12 Fracture
Irregular/uneven
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
1.13 Cleavage
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
{001} Poor
1.14 Mohs Hardness
1.18 Chemical Composition
Not Available
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references