1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.98-2.50Not Available
1
7.18
2.5 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
ConchoidalArthur Thomas, Gemstones (2009)
2.6 Cleavage
Not Available
Not Available
2.7 Mohs Hardness
2.11 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
MnTa 2O 6Walter Schumann , Gemstones of the world (2001) More from other references