CultureEssayEtymologyHistoryScienceUncorrected Toru Nov 15, 2015Jan 07, 2024 corundum, impurities, metal ions, ruby, sapphire Ruby and Sapphire Although I’m not conversant with jewelry, I know ruby and sapphire.Basically, rubies are red, and sapphires are blue. ルビーとサファイア However, Read More