18ct White & Rose Gold Diamond Bubble Dress Ring. With almost half a carat of Diamond 0.44ct, you can be sure of a striking display from this elegant bubble ring design. This ring has the selection of diamonds set in both 18ct white gold and 18ct rose gold. This particular ring is a finger size M but don’t worry, we can resize it for you at no extra charge – just contact us. Interest free credit is available for instore purchases – please ask for details.