spinel ( synonym found)
Definition of spinel:

°any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.
°(solid state chemistry) any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.
Definition of spinel:

°any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.
°(solid state chemistry) any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.
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