malachite -
A mild green colour, like that of the mineral.
Adjektiv
malachite -
From olive-taupe to that of a mild to deeply-rich -- at times seemingly translucent -- green colour, like that of the mineral which is present on oxidized copper.
Wikipedia
Malachite is a copper carbonate mineral, with the formula Cu2CO3(OH)2. This green-colored mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses. Individual crystals are rare but do occur as slender to acicular prisms.