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compound of alumina and a metallic oxide aluminate
substance made of fused alumina alundum
greenish-blue pigment consisting essentially of cobalt oxide and alumina cobalt blue , cobalt ultramarine
white crystalline mineral consisting of aluminum hydroxide; a constituent of bauxite and a source of alumina gibbsite
any of various earths containing silica and alumina and ferric oxide; used as a pigment ocher , ochre
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