1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.5 Durability
Not Available
Not Available
1.8 Specific Gravity
2.39-4.003.34-3.44
1
7.18
1.6 Fracture
ConchoidalGemdat.org, Management Team (2012), ConchoidalGemdat.org, Management Team (2012)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.10 Cleavage
Not Available
{111} Indistinct, {111} Indistinct, {111} Indistinct
1.12 Mohs Hardness
1.17 Chemical Composition
Not Available
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references