14 karat white gold earrings with two .50 carat trillion cut natural blue zircon and 4 diamonds totaling .12 carats. Glacier Ice is a specific variety of Zircon, with an exceptionally deep blue color reminiscent of Alaska's glaciers. Zircon is a natural stone (not to be confused with Zirconium), and with the highest refractive index of any colored stone-they sparkle!