Vintage Mid-Century Transitional Cut Diamond Engagement Ring 14kVintage Mid Century Transitional Cut Diamond Engagement Ring 14k. This vintage engagement ring features a . 38 carat transitional cut diamond set in 14 karat white gold. On the shoulders are thin baguettes that elongate the top of the ring as they taper down to the band. The primary stone is set with four prongs and shines brightly in this classic style.