Mineral Napkin Ring in Brown Set of 4 by Kim Seybert. A sophisticated take on the uniform and harmony found within naturally occurring minerals. the versatile Mineral Napkin Ring is perfect for year-round entertaining. The Mineral Napkin Ring features an authentic emerald-colored malachite ball that sits atop a cast metal orb-shaped ring. Due to the nature of the stones. no two pieces will be the same. Materials: 50% Tigers Eye Stone. 50% Metal Base