From James Avery, this necklace features: Sterling silver Lab-created ruby and mother of pearl doublet Available in a variety of lengths Approx. 13.41mm x 5.41mm x 3.25mm doublet Approx. 16" - 20" L This stone has been layered to achieve a unique color and enhanced surface durability Avoid chemicals, cosmetics, ultrasonic cleaners, and contact with water, soap, steam, and extreme humidity. Crafted in America using the world's finest materials.