Malachite SphereCut the sphere and you would find concentric ringsbanding laid down one mineral layer at a time. Malachite is copper carbonate hydroxideCu(CO)(OH)Mohs 3. 54, forming in the oxidation zones of copper deposits through the reaction of copper bearing solutions with carbonate. Its concentric banding marks each episode of mineralization, producing the eye pattern and striated surfaces that make polished malachite immediately recognizable. This sphere is