C. 1990. Perfectly refined, classically beautiful. If an engagement is in your future, consider this elegant Estate collection ring, featuri… C. 1990. Perfectly refined, classically beautiful. If an engagement is in your future, consider this elegant Estate collection ring, featuring a fabulous .65 carat round brilliant-cut diamond centered on a tapered 14kt white gold band. 3/16" wide. Diamond solitaire ring. Exclusive, one-of-a-kind Estate Jewelry.