22 K Gold Vermeil and Sterling Silver Iolite and Blue Topaz Pendant/PinMaterial: Genuine 22 K Gold Vermeil and Sterling Silver (92. 5% silver content) Stone(s): Genuine blue topaz, genuine iolite, genuine Mabe pearl Overall Dimension (including bail): 1. 7 x 1. 6 x 0. 2 inches Inner Bail Diameter: 4 mm Weight: 10. 4 grams Stamp Mark: N A Serial Number: p25999 Iolite is the deep blue gem variety of the silicate mineral cordierite, named for French geologist Pierre Cordier. Iolite is found on Garnet Island in Canada and in