1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.69-3.812.55-2.63
1
7.18
1.5 Fracture
Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
Uneven, Uneven, Gems
1.6 Cleavage
Distinct on {110}, imperfect on {010}, poor on {001}
{001} Perfect, {010} Good
1.7 Mohs Hardness
1.8 Chemical Composition
BeAl 2 O 4
KAlSi 3O 8Arthur Thomas , Gemstones (2009)