1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.65-2.902.59-2.60
1
7.18
1.5 Fracture
Gemstones (2009), Flexible Flexible fragments.
Brittle, Metallic, Brittle, Metallic
1.6 Cleavage
{001} Perfect
{001} Perfect, {110} Distinct, {101} Distinct
1.7 Mohs Hardness
1.8 Chemical Composition
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)