It is Copper Carbonate Hydroxide having the chemical formula as Cu2(CO3)(OH)2.
Shall always be green. Green shades would vary between light to dark green.
Light green, dark green, black
1.65 - 1.91
3.7 to 3.9
Vitreous, silky, dull
Opaque to translucent.
Varies between 3.5-4 Mohs.
Uneven to Sub-Conchoidal.
|Russia, Untied States, Mexico, Australia, Germany, Romania, Chile, United Kingdom, Zambia, Namibia, Zaire and South Africa.|
Occasionally done to improve the durability and colour.
Special care has to be taken. Avoid exposure to acids and excessive heat. Protect from sharp blows and scratches. Clean with a soft cloth. To be kept away from the water as well.