2.18 Solitaire Marquise Cut Diamond Engagement Ring.  This GIA-certified diamond engagement ring features a dazzling 2.18 carat marquise cut diamond in 14k yellow gold. The marquise diamond has unique, slightly rounded points and elongated facets that fit perfectly into four prongs. The diamond is near colorless with a clarity of SI2. The golden basket cradling the stone melts into a gorgeous, 14k yellow gold band. This ring is a true feast for the eyes!