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
1.98-2.503.62-4.33
1
7.18
1.5 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
1.6 Cleavage
Not Available
Not Available
1.7 Mohs Hardness
1.16 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)