1.10 Ct 5 mm AA Heart Swiss Blue Topaz Stud Earrings - 14K Yellow Gold Beautiful heart-shaped studs to treasure forever. The studs have AA quality Swiss Blue Topaz. Swiss blue topaz is a vivid, electric blue gemstone that is created using heat treatment. Blue Topaz is the December Birthstone. 30 Day No questions asked Return Policy Free-Shipping within US December Birthstone/Birthday or Anniversary Gift