1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
1.4 Specific Gravity
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
None, but may exhibit slight parting
Perfect {010}, imperfect {100}
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Ca2Al3(SiO4)3(OH)