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
Splintery, UnevenArthur Thomas, Difficult, Fibrous
Uneven, Subconchoidal, UnevenArthur Thomas, Fibrous
1.6 Cleavage
Good on [110]
[110] perfect, [101] good, [010] distinct
1.7 Mohs Hardness
1.8 Chemical Composition
NaAlSi 2O 6Ulrich Henn and Claudio C.
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references