Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.25-4.10
5.50-5.90
Fracture
Conchoidal, Conchoidal, Gemstones (2009), Uneven
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Cleavage
Perfect on { 2 01} fair on {010}
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
3.5-4
4
Chemical Composition
Cu2CO3(OH)2
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
