Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.70-3.903.82-4.00
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Perfect on {011}, fair on {100}, poor on {110}
{???} Indistinct
Mohs Hardness
3.5-45.5
2
10
👆🏻
Chemical Composition
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)