The Double Barrel. From the Jewelry Innovations Barrel Aged Collection™, this Black Diamond Ceramic™ men's dome ring has two genuine oak bourbon barrel wood center inlays and a polished finish. The Double Barrel is also available in Rugged Tungsten™and Serinium®, and with inlays from Cabernet, Chardonnay, Scotch Whiskey, American Rye Whiskey and Cognac. Our Barrel Aged Collection features solid wood inlays from authentic whiskey, wine and cognac barrels. Hand crafted by our skilled jewelers, these beautiful bands can be inlaid with barrel wood from specific brands of whiskey upon request.