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 of operations, she was attacked by an aircraft but the attack was beaten back with her anti-aircraft weapons. During the night January 27 1941 she patrolled in the Strait of Messina. From 9 to 18 February 1941 "Malachite" patrolled off Bardia. On February 14 she attempted an attack on an unidentified warship, but fails to launch torpedoes due to the high speed of the target. From 15 to 22 March 1941 she was deployed in the Kythira Strait. On the night of March 19, "Malachite" sighted a cruiser escorted by several destroyers. At 01:19 she launched two torpedoes but they