Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.052.72-2.75
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
[001] perfect
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
3-3.56-6.5
2
10
👆🏻
Chemical Composition
Pb 26Ag 10Cu 24Cl 62(OH) 48 · 3H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)