![]() Malachite is a copper carbonate hydroxide mineral, with the formula Cu 2CO 3(OH) 2. Polysynthetic twinning also present.Īdamantine to vitreous silky if fibrous dull to earthy if massive ![]() Massive, botryoidal, stalactitic, crystals are acicular to tabular prismaticĬommon as contact or penetration twins on. Malachite from the Democratic Republic of the Congoīright green, dark green, blackish green, with crystals deeper shades of green, even very dark to nearly black commonly banded in masses green to yellowish green in transmitted light
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