A brown diamond and diamond ring

centering an oval-shaped light brown diamond, weighing 4.90 carats, within a border of round brilliant-cut diamonds, completed by a pavé-set light brown diamond mount; estimated total diamond weight (both colors): 6.75 carats; mounted in eighteen karat white gold. (brown diamonds not tested for origin of color) - Estimate: $18,000 - 20,000

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Bonhams. Fine Jewelry, 14 Oct 2008. San Francisco, Los Angeles and New York - www.bonhams.com