6" Sky-Blue Chrysocolla on Malachite - Congo

This colorful specimen contains fibrous malachite in spherical botryoidal formations, coated in a pseudomorph of bluish-green colored chrysocolla. Rings from the formation of multiple generations of malachite and chrysocolla pseudomorph, can be seen along the edge of the specimen, where a cross section remains from the minerals' extraction process. Along what could be considered the bottom of the specimen, small amounts of chrysocolla and malachite can be found within the matrix itself.

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 can also 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 bluish-green, bright green, light blue, to even sometimes multicolored specimens depending on the atmosphere present during formation.
Chrysocolla & Malachite
Democratic Republic of the Congo
6.0" long, 4.0" wide, 3.0" tall