5.2" Polished Chrysocolla & Malachite Slab - Bagdad Mine, Arizona


This is a brilliant, polished slab of banded Chrysocolla and plume Malachite from the Bagdad Copper Mine in Arizona. It is a wonderful, banded pattern of vibrant blue Chrysocolla with forest green malachite plumes, and has been polished to a mirror-like finish on one side.

Comes with an acrylic display stand.

Malachite is a basic copper carbonate with the chemical formula Cu2CO3(OH)2. This mineral is known for its intense green color, along with the wide variety of formations and patterns that it's found in. Malachite can grow in botryoidal masses, stalactitic, and reniform formations, typically as a tight cluster of fanning fibrous needles that make up a seemingly solid mass. As layers continue to stack during formation, a banded pattern can sometimes begin to take shape, which explains the rings in all shades of green that are seen on most polished malachite specimens.

Chrysocolla is a basic copper silicate that typically forms as a pseudomorph following other copper based minerals. The chemical formula is considered undetermined due to the varying substitutions of elements and water content in its chemical structure. However, there is a form of chrysocolla with an identifiable chemical formula of Cu2H2Si2O5(OH)4, that can be found in microcrystals.

Regularly, chrysocolla will form as botryoidal lumps and spheres, rarely forming visible crystals. It's also been known to form in both solid and fibrous veins, over fibrous minerals and in crusts. Known for its sharp and vibrant coloring, chrysocolla can display a wide variety of colors such as blueish-green, bright green, light blue to even sometimes multicolored specimens, depending on the atmosphere present during formation.
Chrysocolla & Malachite
Bagdad Copper Mine, Yavapai County, Arizona
5.2x3.4", 1/5" thick