Everybody loves a clear blue sky and you're sure to love these beautiful sky blue topaz earrings. As topaz is the November birthstone, they would also make a lovely November birthday gift. Made from sterling silver, these stud earrings each display a 6mm genuine sky blue topaz gemstone in a 4 prong setting. Stamped with a 925 metal mark, they have a front to back distance of 1.6cm and weigh less than 1 gram as a pair. Butterfly backs secure them in place.