Two-Tone 2 Carat Diamond Engagement Ring in 18k.  This amazing two-toned engagement ring features a GIA certified 2.01 carat round brilliant cut diamond set in 18 karat white and yellow gold. The primary stone is prong set with the white gold, and sits above a yellow gold shank with .25 carats of accents diamonds. This ring is a just perfect for size and sparkle!