Bourbon Barrel RingKoa wood (acacia koa) is found in Hawaii. The color can be highly variable, but tends to be medium golden or red brown (similar to mahogany). The grain of koa wood is usually slightly interlocked, and sometimes wavy. Tungsten is a an extremely hard and dense metal. When combined with carbon alloy, it transforms into tungsten carbide. It is this durable tungsten carbide we use to craft our rings. As tungsten is so hard, so it is very difficult for a