Of a pale grey or bluish-green, especially when covered with a powdery residue.
Covered with a bloom or a pale powdery covering, regardless of colour.
Of a colour ranging from olive-taupe to a mild to deeply-rich (at times seemingly translucent) green, like that of the mineral which is present on oxidized copper.
A bright green mineral, a basic copper carbonate, Cu₂CO₃(OH)₂; one of the principal ores of copper.
A mild green colour, like that of the mineral.