Stain 6320 Delft Blue 100 GmsStain 6320 Delft Blue Cobalt Tin Alumina Blue Spinel, an inorganic pigment, is the reaction product of high temperature calcination in which Aluminum (III) Oxide, Cobalt (II) Oxide, and Tin (IV) Oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of spinel. Its composition may include either one or both of the modifiers SiO2, or ZnO. Can be used to color clay bodies, slips, or glazes. They can be mixed