1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.4 Solubility
1.6 Durability
Not Available
Not Available
1.2 Specific Gravity
3.95-4.03Not Available
1
7.18
1.16 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
ConchoidalArthur Thomas, Gemstones (2009)
1.17 Cleavage
None, but may exhibit parting
Not Available
1.18 Mohs Hardness
1.22 Chemical Composition
Al 2 O 3
MnTa 2O 6Walter Schumann , Gemstones of the world (2001) More from other references