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Sunrise Ruby

The Sunrise Ruby has been the world's most expensive ruby, most expensive coloured gemstone, and most expensive gemstone other than a diamond until the discovery of the Estrela de Fura.

Description
It is a Burmese "pigeon blood" ruby, mounted by Cartier and set between heptagonal diamonds weighing and . It is considered among the rarest of all gemstones. Gemstones of the same quality typically form in only small crystals, making this one an "extremely rare" gem. ==History==
History
The ruby sold for a record US$30.42 million on 12 May 2015 at a Sotheby's auction in Geneva, Switzerland, to Heidi Horten. and bidding started at 11 million Swiss francs or US$11.8 million. Also known as lot 502 of the evening, bidding lasted approximately seven minutes with buyers via phone as the main source of bidding. The Sunrise Ruby greatly surpassed the previous record holder, the Graff ruby ring, which sold for US$8.6 million in November 2014. Its record-setting price has been attributed to the rapid increase in prices for coloured gemstones and public auctions, with figures often "rivaling the performance of the much-sought-after colored diamonds". Following the death of Horten, the jewel was auctioned by Christie's in Geneva on 10 May 2023 for $14.7 million. ==See also==
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