—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 Asscher Emerald Cosma Ring is designed to emulate the emeralds silhouette in a clean bezel setting. — Model is wearing a 2.96ct asscher cut emerald / 4.93 grams Quarter sizes are available upon request.