Chrysocolla ( KRIS-ə-KOL-ə) is a hydrous copper phyllosilicate mineral and mineraloid with the formula Cu2 – xAlx(H2Si2O5)(OH)4⋅nH2O (x < 1) or (Cu, Al)2H2Si2O5(OH)4⋅nH2O).
Chrysocolla specimen from Ray mine, in the Scott Mountain area of Mineral Creek District, Pinal County, Arizona, US
Powder-blue chrysocolla as stalactitic growths and as a thin carpet in vugs inside a boulder of nearly solid tyrolite, from the San Simon Mine, Iquique Province, Chile (size: 14.1 cm × 8.0 cm × 7.8 cm (5.6 in × 3.1 in × 3.1 in))
Banded white to blue green chrysocolla, from Bisbee, Arizona (size: 12.2 cm × 5.5 cm × 5.2 cm (4.8 in × 2.2 in × 2.0 in))
Chrysocolla and silver bolo tie. This chrysocolla specimen is from the Kennecot Copper Mine in Bingham Canyon, West Valley City, Utah.
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. Individual crystals are rare, but occur as slender to acicular prisms. Pseudomorphs after more tabular or blocky azurite crystals also occur.
Malachite from the Democratic Republic of the Congo
The entrance to the Neolithic era malachite mine complex on the Great Orme, Wales
Malachite in the walls of Outokumpu's old mine.
The funerary mask of the Red Queen of Palenque is made from a mosaic of malachite.
