1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.3 Solubility
1.6 Durability
Not Available
Not Available
1.8 Specific Gravity
2.5 Fracture
Not Available
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
2.6 Cleavage
2.7 Mohs Hardness
2.11 Chemical Composition
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references