A 1.80 carat oval blue zircon with 0.43 carats of round white zircon in 18K yellow gold over sterling silver ring measuring approximately 0.46 inches long by 0.46 inches wide - the natural blue zircon ring in warm gold. Natural blue zircon is a genuine mineral whose blue color results from heat treatment of brownish zircon, and whose extraordinary refractive index creates more spectral fire than most gemstones. Not to be confused with cubic zirconia - zircon is a distinct natural mineral. Not sizeable. Accent stones primarily zircon.