article_snippet.sent: Bonhams auctioneers were delighted when a pair of 1930 Cartier art deco ruby and diamond brooches recently sold for £482,500, far outstripping the presale estimate of £80,000 - £120,000.
article_snippet.sent: A single-stone ring by Van Cleef & Arpels featuring a Burmese ruby weighing 13.34 carats, sold for £350,500 to a Hong Kong buyer, breaking price-per-carat records in the UK last year.
article_snippet.sent: A ring featuring a Sri Lankan sapphire weighing 30.08 carats was recently sold by the auctioneers for £326,500.
article_snippet.sent: Bonhams said that a near identical ring sold a decade earlier for only £11,950, equating to a 2,200 per cent increase in price-per-carat.
article_snippet.sent: A new world record for the most expensive ruby, regarded as the most valuable coloured gem, was set last year when a 8.62 carat Burmese stone sold for £5.4million.