1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.69-3.815.90-6.10
1
7.18
1.8 Fracture
Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).
1.9 Cleavage
Distinct on {110}, imperfect on {010}, poor on {001}
{110} Distinct, {001} Indistinct, {100} Indistinct
1.10 Mohs Hardness
1.12 Chemical Composition
BeAl 2 O 4
PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references