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
2.85-3.002.77-2.88
1
7.18
1.6 Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Uneven
1.7 Cleavage
1.8 Mohs Hardness
1.11 Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)