1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.6 Solubility
Not Available
Not Available
1.9 Durability
Not Available
Not Available
1.11 Specific Gravity
1.15 Fracture
Conchoidal, Brittle, Conchoidal
Uneven, UnevenArthur Thomas, Gemstones (2009)
1.16 Cleavage
Good on [110] and on [001]
[001] perfect
1.17 Mohs Hardness
1.19 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
Pb 26Ag 10Cu 24Cl 62(OH) 48 · 3H 2OWalter Schumann , Gemstones of the world (2001) More from other references