C.1990 Vintage 1.18ct Diamond Solitaire Engagement Ring, Diamonds. Size 8 $5,036.50 C. 1990. Spectacular 1.18 carat diamond solitaire Estate engagement ring is filled with vintage charm! Showcases a center round brilliant cut diamond and a band sparkling with round diamond accents. Such a beautiful and sophisticated design, absolute elegance! Platinum ring. Exclusive, one-of-a-kind Estate Jewelry.