An Etymological Dictionary of Astronomy and Astrophysics

Red form of corundum, Al₂O₃, which owes its color to traces of chromium. Used in laser as a gem stone.

Etymology (EN): M.E. rubi, from O.Fr. rubi, from M.L. rubinus lapis “red stone,” from L. rubeus “red,” related to ruber→ red.

Etymology (PE): Yâqut, yâkand related to Gk. hyakinthos “hyacinth,” probably ult. from a non-I.E. Mediterranean language.