1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.60-3.612.60-2.65
1
7.18
1.5 Fracture
Conchoidal
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
1.6 Cleavage
Imperfect/fair/absent
Perfect on {001}, very good on {010}, imperfect on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)