Tin Vanadium Yellow Cassiterite, an inorganic pigment, is a reaction product of high temperature calcination in which Tin (IV) Oxide and Vanadium (V) Oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of cassiterite. Its composition may include any one or a combination of the modifiers Al2O3, Fe2O3, MgO, NiO, SiO2, or TiO2.