5 Carat Diamond Earrings in 18k Yellow Gold5 Carat Diamond Earrings in 18k Yellow Gold. These modern diamond earrings are absolutely amazing and feature two Old European cut diamonds totaling 5. 61 carats, and are set in 18 karat yellow gold. The diamonds have a fair bit of warmth to them (between Q and Z color), and are very clear at VS2 clarity. This is accented by the warm color of the 18 karat yellow gold setting. The stones are bezel set and drop very slightly for a small amount of