A mysterious and alluring black diamond eternity ring in 18 carat white gold. Set in 18ct gold. Each ring has a minimum 0.44ct weight We stock sizes J to O. (other sizes available on request) Unsure of your ring size? Request a free ring size guide. -- A beautiful combination of 3 high quality diamond skinny eternity rings in 18 carat hallmarked gold. 2 natural high quality diamond rings sit either side of a black diamond full eternity ring to stunning effect. This combination comes with its own presentation case, a certificate of authenticity and a 5 year warranty.