These earrings feature four strands of Herkimer diamonds from New York. The crystals are beautiful, but the Herkimer diamonds truly sparkle and shine with a refreshing brilliance. The shape is rough rock (each one is unique). Length from the hook: approximately 4 cm. Earring hooks: K18 yellow gold (hallmark is present, though difficult to see). Pins and wire: K14GF. After use, please gently wipe with a soft cloth.