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
3.65-4.553.28-3.31
1
7.18
1.6 Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.7 Cleavage
None, but may exhibit slight parting
None observed
1.8 Mohs Hardness
1.13 Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.