Malachite Congo, polished 55gr ≈
€10.00
Polished malachite from Congo with rich green banding. A copper carbonate crystal showcasing natural layered structure and mineral formation.
Approximate dimensions: 4 x 3.5cm ≈, weight 55gr ≈
Please note that each piece may vary slightly in size and appearance, reflecting the natural character of minerals/crystals and the individuality of each piece.
Availability: 1 in stock
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Malachite is a crystal composed of copper carbonate hydroxide Cu2CO3(OH)2Cu₂CO₃(OH)₂. It forms in the oxidation zones of copper deposits, where chemical processes transform primary copper minerals into secondary minerals over time.
This polished piece allows the internal structure of the mineral to be clearly visible, especially its characteristic banding.
Color and Pattern
Malachite is known for its strong green color, which comes from its copper content. In polished form, the stone reveals distinct banded patterns, ranging from light to deep green.
These bands form through repeated mineral deposition, creating concentric or flowing patterns. Each polished piece displays a unique arrangement depending on its growth history.
How Does Malachite Form?
Many people ask how malachite develops. It forms through the weathering of copper sulfide minerals such as chalcopyrite or bornite. When exposed to oxygen, water, and carbon dioxide, copper-rich solutions react with carbonate ions.
Over time, this leads to the gradual formation of malachite in layered structures, which become more visible once the surface is cut and polished.
What is Polished Malachite Used For?
Another common question is what polished malachite is used for. Due to its visual patterns and smooth finish, it is widely used as a decorative stone, in carvings, and as a mineral specimen for collectors.
Polishing enhances both the color contrast and the visibility of internal structures, making it suitable for display.
Origin: Congo
The Democratic Republic of Congo is one of the most important sources of high-quality malachite. Material from this region is known for its strong color contrast and clearly defined banding.
Care and Handling
With a Mohs hardness of 3.5–4, malachite is relatively soft and sensitive to acids and chemicals. Even in polished form, it should be handled with care.
Clean with a soft cloth. Avoid harsh chemicals
