1.78 Ct London Blue Topaz Stud Earrings in 18K Yellow Gold Stunning earrings for your lady love. The studs have the finest AAA quality emerald-cut London Blue Topaz prong-set in 18K Yellow Gold. The London Blue Topaz is coveted for its deep, rich blue hues which is obtained by treating natural colorless Topaz treated to get the color.. 30 Day No questions asked Return Policy Free-Shipping within US December Birthstone/ Birthday/Anniversary Gift