MALACHITE CHRYSOCOLLA SPECIMEN
A beautiful Malachite Chrysocolla Specimen. This mineral is great quality, aqua blue green of Chrysocolla with forest green Malachite. This specimen will add a splash of colour to your collection. Wonderful contrast with good size. Chrysocolla has a pretty unique colour to the mineral world. As with many blue and green rocks, this is an ore of copper, as you can see in the formula below.
Kilwesi – Katanga, Congo.
12cm x 7.8cm x 5.7cm, 282g.
Named in antiquity by Pliny the Elder 79 CE molochitus after the Greek mallows in allusion to the green color of the leaves. Known in the new spelling, malachites, at least by 1661.
Malachite is a green and common secondary copper mineral with widely variable habit. Typically found as crystalline aggregates or crusts, often banded in appearance like agates. It is also often found as botryoidal clusters of radiating crystals, and as mammillary aggregates. Single crystals and clusters of distinguishable crystals are uncommon, but when found they are typically acicular to prismatic. Frequently found as a pseudomorph after Azurite crystals, which are generally more tabular in shape.
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Chrysocolla: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O.
The name was first used by Theophrastus in 315 B.C. and comes from the Greek chrysos, meaning “gold,” and kolla, meaning “glue,” in allusion to the name of the material used to solder gold. André-Jean-François-Marie Brochant de Villiers revived the name in 1808. Chrysocolla forms in the oxidation zones of copper rich ore bodies.