Malachite & Calcite, from Mina Ojuela, Mapimi, Drango, Mexico (REF:RSB27)

Malachite is a copper carbonate hydroxide mineral. This opaque, green banded mineral crystallises 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.

Malachite comes from various worldwide places such as Democratic Republic of Congo, Gabon, Zambia, Namibia, Mexico, New South Wales, France, Israel and southwestern United States, most notably in Arizona.

Calcite is a very common and widespread mineral which comes in a variety of colours, such as White, Yellow, Red, Orange, Blue, Green, Brown, Grey.

It also occurs in a wide variety of forms, the molecular structure of the crystals is rhombohedral (cube like) but specimens can appear as as scalenohedrons (mirror image pyramid shape), prisms (triangle like), masses (consisting of or forming a large mass), stalactites (icicle like).