1.01 Antique Cushion Diamond Engagement Ring 14kThis halo engagement ring centers on a 1. 01 carat antique cushion cut diamond, GIA certified with M color and SI2 clarity, set in 14 karat yellow gold with a split shank. The old mine cushion cut predates modern cutting techniques and has a softer, more romantic sparkle pattern with larger facets than today's precision cutseach stone has its own individual character. M color falls in the faint yellow range, but the warm metal tone makes the diamond's