1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.4 Solubility
Not Available
Not Available
1.2 Durability
Not Available
Not Available
1.4 Specific Gravity
3.28-3.312.55-2.63
1
7.18
2.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, Uneven, Gems
2.6 Cleavage
None observed
{001} Perfect, {010} Good
2.7 Mohs Hardness
2.11 Chemical Composition
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.
KAlSi 3O 8Arthur Thomas , Gemstones (2009)