Amethyst
Tutankhamun, St. Valentine, and a long line of Catholic Bishops loved Amethysts, probably due to Amethyst’s purple color (the color of royalty), which owes its color to heating processes and iron impurities from 130 million years ago.
Known as the Gem of Fire and Purple Quartz, Amethyst was also once as pricey as diamonds. Ancient Egyptians, Hindus, Christians, and many other cultures used Amethyst amulets for protection.