Yellow Gold Solitaire Diamond Engagement Ring in 14kYellow Gold Solitaire Diamond Engagement Ring in 14k. This bright modern engagement ring features a . 96 carat round brilliant cut diamond and is finished in 14 karat yellow gold. The large and highly polished prongs give this ring a bright presence along with the small accent diamonds on the shoulders. The band also gets thicker toward the center stone on the shoulders and this subtle taper creates a nice smooth side profile.