Matrix Napkin Ring in Silver Set of 4 by Kim Seybert. The silver-colored Matrix napkin ring is table jewelry that demands attention. Its elongated cast brass cuff is adorned with hand-attached mother-of-pearl elements. An organic edge treatment creates a captivating high-low effect on the textured border. The luxurious blend of silver-colored metal and mother of pearl. combined with the organic design. makes the Matrix a unique accessory for your table. It is also available in gold. Materials: 90% Brass. 9.5% MOP. 0.5% Nickel