Exotic wood inlay on Black Ceramic ring is made of high tech scratch proof black ceramic and has a genuine beautiful dark black walnut inlay bringing together the newest material and the oldest material to be used in jewelry. This comfort-fit band has beveled edges and comes in 4mm, 6 mm, 8 mm, & 10 mm wide, which is perfect for couples that want a matching set. Black Ceramic does not scratch or lose its color. Note: the inlay is protected by a resin that can show scratches over time. Free Lifetime Sizing and Lifetime Warranty on all Thorsten rings.