noun🔗ShareAny of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours."The jeweler showed me a beautiful ring featuring a vibrant red spinel. "mineralmaterialgeologyChat with AIVocabulary GamePractice Reading
noun🔗ShareAny crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral."The scientist analyzed the new ceramic material and confirmed that it had a spinel structure, meaning its atoms were arranged in the same way as the magnesium aluminum oxide mineral. "materialmineralchemistrygeologysciencestructureChat with AIVocabulary GamePractice Reading
noun🔗ShareBleached yarn in making the linen tape called inkle; unwrought inkle."The basket contained not just finished inkle tape, but also the spinel, the bleached yarn ready to be woven. "materialitemChat with AIVocabulary GamePractice Reading
