Round Cathedral Solitaireround solitaire engagement ring in 14K solid gold Searching for a classic round solitaire engagement ring in 14K solid gold? The Round Cathedral Solitaire puts all the spotlight on a breathtaking moissanite center stone, elegantly set in 14K solid gold and starting at $426. Each ring is made to order, allowing you to choose your preferred center stone size, metal color, and moissanite type for a truly personalized piece. Backed by our lifetime