几种立方对称的坚硬矿物之一,为镁和铝的混合氧化物,可作各种颜色的宝石。
几种立方对称的坚硬矿物之一,为镁和铝的混合氧化物,可作各种颜色的宝石。
Any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.
任何一种晶体材料,不一定是氧化物,具有与此矿物相同的晶体结构。
Any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.
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