1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)
Uneven, Subconchoidal, UnevenArthur Thomas, Fibrous
1.6 Cleavage
Not Available
[110] perfect, [101] good, [010] distinct
1.7 Mohs Hardness
1.8 Chemical Composition
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references