This is just a gorgeous pendant!! What really sets this pendant apart from the others is the beautiful and unusual Green Topaz smooth cabochon gemstone that is brilliantly combined with natural Australian opal. You don't often find This quality of Green topaz in a smooth cabochon cut in larger sizes..this 16 x 12 green topaz stone is set above a shimmering free form Australian opal doublet. The opal in this pendant is a natural opal doublet and will vary slightly from the one pictured. handmade by our artisans and set into 2.3 grams of Sterling Silver.