POLISHED GREEN MALACHITE AND BLUE CHRYSOCOLLA - Congo For Sale

Polished Blue Chrysocolla with Green MalachiteFrom: CongoWeight: 3.4ozMeasures: 2.44" x 1.19"Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation.The stone's name derives (via Latin: molochītis, Middle French: melochite, and Middle English melochites) from Greek Μολοχίτης λίθος molochites lithos, "mallow-green stone", from μολόχη molochē, variant of μαλάχη malāchē, "mallow". The mineral was given this name due to its resemblance to the leaves of the mallow plant.Chrysocolla is a hydrated copper phyllosilicate mineral and mineraloid with formula Cu 2–xAl ₓ{H 2–xSi ₂O ₅ ₄•nH ₂O or ₂H ₂Si ₂O ₅ ₄•nH ₂O)The name comes from the ancient Greek χρυσός (chrysos) and κολλα (kolla), "gold" and "glue," in allusion to the name of the material used to solder gold and was first used by Theophrastus in 315 BC.Chrysocolla has a cyan (blue-green) color and is a minor ore of copper, having a hardness of 2.5 to 7.0. It is of secondary origin and forms in the oxidation zones of copper ore bodies. Associated minerals are quartz, limonite, azurite, malachite, cuprite, and other secondary copper minerals. It is typically found as botryoidal or rounded masses and crusts, or vein fillings.