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Cartier Diamond Ring, circa 1930s, set with two pear-shaped diamonds weighing 2.31 and 2.34 carats respectively, further accented with two marquise-shaped diamonds, signed Cartier London, case stamped Cartier Paris. (=)

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DIAMOND RING, HARRY WINSTON. Claw-set at the centre with a pear-shaped diamond weighing 10.50 carats, flanked by similarly shaped diamonds, mounted in platinum, signed Winston.

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AN IMPORTANT DIAMOND RING, BY GRAFF. Set with an oval-shaped diamond, weighing approximately 26.24 carats, to the pear-shaped diamond shoulders, weighing approximately 1.06 and 1.04 carats, in platinum...

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A SINGLE-STONE DIAMOND RING, BY HARRY WINSTON Set with a pear-shaped diamond weighing 5.05 carats to the tapered baguette-cut diamond shoulders and platinum hoop With jeweller's mark for Harry Winston 5.05 carats

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Edwardian twin-stone pear-shape diamond ring. This resplendent diamond dinner ring, dating back to the first decades of the 20th century, scintillates with a bright-white and shining pair of pear-shaped diamonds set back-to-back atop a finely handcrafted setting rendered in platinum over 18 karat gold, accented with tiny old-cut diamonds. The dazzling pair of pear-shaped diamonds respectively weigh 1.20 carats and .80 carats ( 2.00 carats total). Via Diamonds in the Library.

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A COLOURED DIAMOND RING Set with a fancy light pink pear-shaped diamond, weighing approximately 11.67 carats, to the pavé-set diamond openwork gallery and shoulders, mounted in gold#Love

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SAPPHIRE AND DIAMOND RING, OSCAR HEYMAN & BROTHERS. Claw-set with a cushion-shaped sapphire weighing 17.84 carats, within a line of pear-shaped diamonds, further decorated with brilliant-cut stones, mounted in yellow gold and platinum

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