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
Uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {001}, imperfect on {110}
[001] perfect
1.7 Mohs Hardness
1.8 Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
Pb 26Ag 10Cu 24Cl 62(OH) 48 · 3H 2OWalter Schumann , Gemstones of the world (2001) More from other references