1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.3 Solubility
Not Available
Not Available
1.2 Durability
Not Available
Not Available
1.4 Specific Gravity
2.59-2.606.30-6.39
1
7.18
1.6 Fracture
Brittle, Metallic, Brittle, Metallic
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.7 Cleavage
{001} Perfect, {110} Distinct, {101} Distinct
[001] good, [210] distinct
1.8 Mohs Hardness
1.11 Chemical Composition
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references