Duchess of Roxburghe's Rubies

Designed as a rivière of twenty-four cushion-shaped rubies alternating with twenty-four similarly shaped diamonds, mounted in silver and gold, length approximately 433mm, accompanied by the original worksheet listing the weights of the stones and stating that four rubies and four diamonds were added to lengthen the original necklace on 24th October 1884. The turquoise velvet fitted case embellished with the monogram R under a coronet, by R&S Garrard & Co, Goldsmith and Jewellers to The Crown, 25 Haymarket, London, .

Condition

Please refer to SSEF report for details on the rubies. Please note that the synthetic ruby is number 19 from the clasp clockwise and not the one next to the clasp as stated in the catalogue. Rubies estimated to weigh approximately 50.00 - 60.00 carats in total. Homogeneous red colour, well matched with good saturation and brilliance, lively stones with some typical crystal inclusions (some reaching surface), a few minor nicks and abrasion to facet junction. The two Thai rubies are estimated to weigh approximately 2.15 and 1.10 carats respectively, the synthetic ruby estimated to weigh approximately 1.90 carats. In 1837, the first synthetic ruby crystal was produced from aluminum oxide in a laboratory. By 1877, the French chemist Edmond Fremy developed an effective method to produce commercial ruby by using molten baths of alumina, yielding the first gemstone-quality synthetic stones. Diamonds estimated to weigh approximately 45.00 - 55.00 carats in total, mixed in colour and clarity, generally I-J (a few J-K), VS2-I clarity. Clasp secure, with safety chain. tarnish and scratches to metal commensurate with age and wear. Rare and impressive collection of unheated Burmese rubies. Well preserved, in exceptional condition.

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