- The Trace Collection The Oval Diamond Ribbon Trace Ring is crafted of polished 18 karat gold, showcasing a Ribbon style line that delicately dances around the finger with an oval cut diamond that nestles within the band. Diamond is a lab grown oval cut 1.78ct G VS2 GCAL Certification This ring is ready to ship in Yellow Gold in a size 6.5 -Handcrafted in Los Angeles, California.