1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
Indistinct
From the Greek for oblique and fracture, descriptive of the cleavage
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
(Na,K)AlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)