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".
Malachite Room of the Winter Palace Malachite Room of the Winter Palace The Malachite Room of the Winter Palace, St Petersburg, was designed in the late 1830s by the architect Alexander Briullov for use a formal reception room for the Empress Alexandra Fyodorovna, wife of Nicholas I. It replaced the Jasper Room, which was destroyed in the fire of 1837. The room obtains its name from the use of malachite for its columns and fireplace. This large salon contains a large malachite urn as well as furniture from the workshops of Peter Gambs (1802-1871), son of the famous furniture maker Heinrich Gambs, which were rescued from