1 Physical Properties
1.1 Tenacity
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1.2 Solubility
Not Available
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1.3 Durability
Not Available
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1.4 Specific Gravity
1.5 Fracture
Not Available
Sub-Conchoidal, Irregular/uneven, Sub-Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
3,1 basal
[100] Perfect, [110] Good, [011] Distinct
1.7 Mohs Hardness
1.8 Chemical Composition
Be3Al2SiO6
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references