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
3.65-4.552.56-2.62
1
7.18
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
None, but may exhibit slight parting
From the Greek for oblique and fracture, descriptive of the cleavage
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
(Na,K)AlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)