A star sapphire and diamond ring

centering a round cabochon star sapphire within a surround of marquise and pavé-set round brilliant-cut diamonds; star sapphire weighing approximately: 13.50 carats; estimated total diamond weight: 2.60 carats; mounted in platinum. Estimate: $4,000 - 6,000

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