Stackable expressions™ is a simple and stylish assortment of rings that can be worn together to express your style, your family and your personality. Add glamour to your look with a stackable expressions™ 6. 0-6. 5mm black tahitian cultured pearl ring. This sterling silver ring will be polished to a brilliant shine. Add some extra sparkle with additional stackable expressions™ polished or textured bands and diamond, message, or enamel rings. With stackable expressions™, it's your look, your way. Sterling silver rings cannot be resized after purchase.