(Molecular Weight = 143.09 gm)
Copper 88.82 % Cu
Oxygen 11.18 % O
Oxidized zone of copper deposits.
Commonly in the copper deposits of SW USA and in Chile.
From the Latin, cuprum, meaning copper. Chalcotrichite from the Greek, meaning "hairy copper."
brown red, purple red, red, or black.
Transparent to translucent
Massive - Granular - Common texture observed in granite and other igneous rock., Capillary - Very slender and long, like a thread or hair (e.g. millerite).,
3.5-4 - Copper Penny-Flourite