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A ruby and diamond 'Trombino' ring, by Bulgari.  Photo Christie's Image Ltd 2013

Centering upon a cabochon ruby, to the baguette-cut and pavé-set diamond surround and shoulders, mounted in platinum and gold, ring size 8¼, in dark blue leather Bulgari case. Signed Bulgari. Estimate CHF28,000 – CHF48,000

Christie's. MAGNIFICENT JEWELS. 15 May 2013. Geneva