HOT! 14 karat gold-plated sterling silver and cubic zirconia star/ sun burst ring with genuine amethyst center. Amethyst measures 6mm in diameter, band measures 1.5mm and total sun measures 20.5mm x 21.5mm. ABOUT AMETHYST - Forever fashionable, richly hued amethyst celebrates February birthdays and 4th, 6th, 9th, and 17th anniversaries. Amethyst was thought by the ancient Greeks to be conducive to a sober and serious mind. It became a stone of royalty for the Egyptians, standing for integrity, and it was worn by warriors to aid their courage. In Europe, amethyst was considered to be the stone of St. Valentine and that of faithful, committed lovers.