Zircons are natural stones, and are not to be confused with the similarly named but completely unrelated cubic zirconia, the ubiquitous synthetic diamond simulant. Zircons are fascinating and historic stones, prized for their unusually bright lustre and high dispersion, rivalling that of diamond. Combined with an array of vivid colours including rich gold and sherry tones to deep greens and swimming pool blues, zircons make a beautiful and unusual choice for any engagement ring.