Blue Topaz Stud Earrings in 14k Yellow Gold. For a set of dreamy studs that pair well with any look, these blue topaz earrings will take your breath away. Totaling 2.12 carats in weight, each topaz is set in secure prongs of 14 karat yellow gold. The gems have an electric, icy blue hue and feature facets that scintillate when touched with light. These studs would make a fabulous gift for anyone with a birthday in the month of December!