1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
Not Available
Perfect [001] good [010] poor [110]
1.7 Mohs Hardness
1.8 Chemical Composition
MnTa 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)