Cobalt Silicate Blue Olivine, an inorganic pigment, is a reaction product of high temperature calcination in which Cobalt (II) Oxide and Silicon (IV) Oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of olivine. Its composition may include any one or a combination of the modifiers Al2O3 , B203, CaO, PbO, or ZnO.