—Cosma Collection Celebrating love. A collection to remember the unforgettable moments, special occasions, and the beauty of what life brings. An iconic symbol of continual happiness and love. Crafted of polished 18K gold, our Cosma Ring is designed to emulate the diamond silhouette in an octagon bezel setting. Diamond is a Lab Grown 2.51ct D VVS2 with an IGI Certification Available in 18K White Gold in a size 6 — Handcrafted in Los Angeles, California.