Paul Flato ruby, sapphire and colored diamond enamel brooch, designed and worn by Standard Oil heiress Millicent Rogers. Estimate: $350-500,000 at Christie's Magnificent Jewels auction in New York.

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Paul Flato ruby, sapphire and colored diamond enamel brooch, designed and worn by Standard Oil heiress Millicent Rogers. Estimate: $350-500,000 at Christie's Magnificent Jewels auction in New York.

Paul Flato ruby, sapphire and colored diamond enamel brooch, designed and worn by Standard Oil heiress Millicent Rogers. Estimate: $350-500,000 at Christie's Magnificent Jewels auction in New York.