Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.052.90-2.98
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, ConchoidalWalter Schumann
Cleavage
[001] perfect
Distinct on {11 2 0}, imperfect on {10 1 1}
Mohs Hardness
3-3.57.5-8
2
10
👆🏻
Chemical Composition
Pb 26Ag 10Cu 24Cl 62(OH) 48 · 3H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references