1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.4 Durability
Not Available
Not Available
1.6 Specific Gravity
2.97-3.143.28-3.31
1
7.18
1.7 Fracture
Uneven, Conchoidal, Brittle
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.8 Cleavage
{1011} Indistinct
None observed
1.9 Mohs Hardness
Not Available6.5-7.5
2
10
1.12 Chemical Composition
Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.