18 karat white gold ring with one 1.67 carat round natural blue zircon and 46 round diamonds totaling .40 carats. Prized for its deep blue and intense shine, this remarkable stone has more brilliance than any colored gemstone and is often used as an alternative to the blue diamond. Blue zircon is the official birthstone for December and is a natural stone-not to be confused with cubic zirconium. As the largest importer of ™Glacier Ice Blue Zircon in the United States, we at Goldsmith Gallery offer the largest selection of the highest quality stones at the best value. As the popularity of this incredible gem is growing by leaps and bounds, it will only increase in worth. It is a great time to buy!