Silver Engagement Ring. Oval Solitaire 4ct Cubic Zirconia Sterling Silver Engagement Ring. With its fancy oval cut 12mmx10mm quality CZ it speaks of exalted beauty and at 4 cts of the value of the wearer. This engagement ring is made from highly polished quality sterling silver and it is made to order so you can have it made for your loved one perfect from the start. This ring makes a perfect promise ring and since some may confuse it for white gold it is also one of the most affordable solutions for someone on a tight budget. Beauty tradition and love can all be yours and your loved one with this very special ring. Not only is this piece gorgeous but being custom made just for you makes it extra special plus being our own line you can be sure that there are not going to be many others who have it. Combine that with this amazing affordability and you have a piece that's beautiful in all ways.