Rings by Josef Koppmann The ring is forged of sterling silver and the Amethyst is set in 24 carat gold. Features Primary Material : 24ct gold, amethyst and sterling silver One of a Kind : No Metal : 24ct gold and sterling silver Gems : amethyst Hallmarked : Yes Cleaning InstructionsThe ring is best kept clean by rubbing and brushing it gently under running water with bicarbonate of soda.