noun🔗ShareCorindónAn extremely hard mineral, a form of aluminum oxide with the chemical formula Al2O3, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive."Because of its hardness, corundum is used in sandpaper to smooth rough wood. "Debido a su dureza, el corindón se utiliza en papel de lija para alisar la madera rugosa.mineralmaterialgeologysubstancechemistryscienceChat with AIVocabulary GamePractice Reading
