1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.4 Solubility
Not Available
Not Available
1.6 Durability
Not Available
Not Available
1.7 Specific Gravity
1.8 Fracture
Not Available
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
1.9 Cleavage
1.10 Mohs Hardness
1.11 Chemical Composition
BeAl 2 O 4
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.