Cobalt (II) carbonate is the inorganic compound with the formula CoCO3. This reddish paramagnetic solid is an intermediate in the hydrometallurgical purification of cobalt from its ores. It is an inorganic pigment, and a precursor to catalysts.

Cobalt carbonate, also known as spherocobaltite, is a mineral with chemical formula CoCO3. It is the carbonate salt of cobalt. It forms red trigonal crystals with specific gravity 4.13 which decompose on melting. Cobalt carbonate is insoluble in either cold or hot water but soluble in acids.
Cobalt carbonate is used in pottery glazes and may be found in pottery supply stores. Cobalt carbonate has same coloring application as it decomposes to cobalt oxide at high temperature. Cobalt carbonate tends to disperse better in a glaze but can produce blisters because of the CO2 gas presence at high temperature. Commercial grades of cobalt carbonate are the complex of carbonate and hydroxide such as cobalt carbonate hydroxide (1:1) (CAS RN: 12069-68-0), Cobalt carbonate hydroxide (2:3) (CAS RN: 12602-23-2), and cobalt carbonate hydroxide (2:3) monohydrate (CAS RN: 51839-24-8).