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Tiffany developed its ownsquare-shaped, mixed-cut stone called the Lucida, which was first launched in 1999. Named after the brightest star ina constellation, the Lucida solitaire diamond sits beautifully atop an open, curved diamond band in a crossover, four-prong setting that allows light to pass through the stone. Tiffany Lucida engagement rings are no longer produced making them rare and quite valuable today.
