9k Gold, Tourmaline Gemstone, and Cubic Zirconia Ring. The center gemstone Tourmaline is surrounded by round cut cubic zirconia stones creating the shape of a flower. All the stones are in a prong setting. The band is designed with 4 hearts near the gemstones. 375 stamp can be found in ring band interior. Ring is a size 5.5 and weighs a total of 0.04 ozt.