Koa wood ring with crushed pearl inlayPolished titanium ring with Koa wood and mother of pearl inlays. Crushed Mother of Pearl gives this ring a huge pop of color when the light hits it just right. Waterproofed Comfort fit 100% repairable, lifetime warranty. Ships fast and crafted in the USA. Hypoallergenic Koa wooden ring More Koa inlay rings here! This ring features a selection of Koa formed in the bentwood tradition. The term "bentwood" comes from the handcrafted technique using steam