Two Tone Diamond Solitaire Engagement Ring in 14k. This diamond solitaire engagement ring features a .87 carat Round Brilliant cut diamond in a 14 karat white gold basket on a shank of 14 karat yellow gold. The yellow gold shank of this beautiful ring widens gently toward the head with its contrasting white gold. The shoulders feature a polished braided design, meeting the white gold basket with fine open work.