Cobaltoan dolomite is typically pale pink, rose-colored, or even reddish, due to the presence of cobalt. The cobalt ions in the crystal lattice impart the characteristic pink to purple hue to the dolomite. Malachite is a secondary copper mineral, meaning it forms as a result of the oxidation of copper deposits. And it's known for its vivid green color. The combination of soft pink with bright green often creates aesthetic harmony, as the cobaltoan dolomite adds a delicate, pastel-like contrast to the deep green malachite.These minerals form in relatively specific geological environments, making specimens featuring both minerals quite rare.