Malachite Malachite Malachite is a copper carbonate hydroxide mineral, with the formula CuCO(OH). This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare but do occur as slender to acicular prisms. Pseudomorphs after more tabular or blocky azurite crystals also occur. The stone's name derives (via , , and Middle English "melochites") from Greek Μολοχίτης λίθος "molochitis lithos", "mallow-green stone", from μολόχη "molōchē", variant of μαλάχη "malāchē", "mallow".
Italian submarine Malachite she again patrolled of Ras Aamer. From 11 to 23 February, 1942 she was deployed to an area off the coast of Cyrenaica. From 8 to 21 April, 1942 again she was again deployed off the coast of Cyrenaica. From 1 June to 9 June, 1942 and then again from June 15 to 18, 1942 "Malachite" was posted northwest of Algiers. She was then relocated to patrol off Cape Blanc from 22 to 24 June. On July 16 1942 "Malachite" was sent to patrol along the Tunisian coast, however had to return to the base the next day due to