Ruby other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions may indicate that the stone has been treated. Ruby is the traditional birthstone for July and is usually more pink than garnet, although some rhodolite garnets have a similar pinkish hue to most rubies. The world's most valuable ruby is the Sunrise Ruby. Rubies have a hardness of 9.0 on the Mohs scale of mineral hardness. Among the natural gems only moissanite and diamond are harder, with diamond having a Mohs hardness of
Sunrise Ruby bidding started at 11 million Swiss francs or US$11.8 million. Also known as lot 502 of the evening, bidding lasted approximately 7 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 and often "rivaling the performance of the much-sought-after colored diamonds". Sunrise Ruby The Sunrise Ruby is the world's most expensive ruby, most expensive coloured gemstone, and most expensive