1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Brittle, Uneven, Brittle, Uneven
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal
1.6 Cleavage
Perfect on {001}, imperfect on {110}
{???} Indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)