... is a mineral composed of Mg-Al oxides, as containing magnesium, iron, zinc, manganese, etc. elements, they can be divided ... different elements, different spinel can have different colors, for example, magnesium spinel is between the red, blue, green, brown, and ... metamorphic belt of magnesian limestone and granite and intergrowth with magnesium olivine and diopside. The spinel in the basite and ...