1.43 Old European Diamond Engagement Ring in 14k Yellow Gold1. 43 Old European Diamond Engagement Ring in 14k Yellow Gold. This dazzling modern engagement ring features a 1. 43 carat Old European cut diamond set in 14 karat yellow gold. Recycling old cut diamonds is a favorite practice of ours, and allows for a subtle difference from commonly seen solitaire designs. This elegant design is a made by us and we love the way the small diamond accents really seem to balance the center stone.