... than 200 varieties of spinel.Spinel is a family mineral, formed by contact metamorphism in the molten magma when this magma intrusting ... blue, yellow, and brown and so on. Spinel is divided by its color variety; there is red, orange, blue-violet, blue ... spinel in the basite and ultrabasic rocks is directly crystallized by magma, associated with pyroxene, olivine, magnetite, chromite and platinum ...