How is malachite formed?

Answer 1

Malachite is formed primarily through the weathering and oxidation of copper-bearing minerals, often in the presence of carbonate-rich waters. The process typically occurs in copper deposits, where copper ions are leached and precipitated as malachite. This mineral often forms in layers or as botryoidal (grape-like) aggregates, resulting from the slow crystallization of copper carbonate in sedimentary environments. Additionally, malachite can also form in the presence of other minerals through various geological processes.