1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.65-2.693.65-4.55
1
7.18
1.5 Fracture
Uneven, Uneven, Conchoidal, Uneven, Gems, Sixth Edition (2006)
ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {001}, good on {010}
None, but may exhibit slight parting
1.7 Mohs Hardness
1.8 Chemical Composition
(Na,Ca)Al1-2Si3-2O8
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)