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 December 1942 she patrolled an area between the island of La Galite and Cape de Fer. She patrolled off the island of La Galite on January 4 and 5 1943 again. On January 21 "Malachite" was deployed to an area between Cape Carbon and Cape Bougaroun. At 4:55 on January 22 she sighted an incoming convoy heading to Bona. At 05:18 she fired four torpedoes, and dove to avoid an attack by the escorts. Two explosions were heard, but again British post-war documents contain no mention of this attack. On February 2, 1943 "Malachite" left Cagliari with a group of