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A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Other varieties of gem-quality corundum are called sapphires . Ruby is one of the traditional cardinal gems , together with amethyst , sapphire , emerald , and diamond . [ 1 ]
The ruby was discovered by Dubai-based FURA Gems in its mine in Mozambique on July 21, 2022. [2] [3] [4]Before its unveiling and cutting, Daniel Nyfeler, managing director of Gübelin Gem Lab, stated: "the Estrela de Fura ruby is likely to yield an intense, saturated red colour once fully and properly faceted with adequate proportions, is relatively free of eye-visible inclusions.
The Sunrise Ruby greatly surpassed the previous record holder, the Graff ruby ring, which sold for US$8.6 million in November 2014. [4] [12] 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 ...
Several ruby-set pieces were included in the sale, notably a ring set with an 8.24 ct gem that broke the 'price-per-carat' record for rubies (US$512,925 per carat – i.e., over US$4.2 million in total), [37] and a necklace [38] that sold for over US$3.7 million.
Emerald of Saint Louis, [5] 51.60 carats cut; discovered in Austria, probably Habachtal, resides in the National Museum of Natural History, Paris Gachalá Emerald [ 6 ] Mogul Mughal Emerald , 217.80 carats cut; mined in Colombia and cut in the Mughal empire in Hijri year 1107 (1695–1696), resides in the Museum of Islamic Art, Doha , Qatar [ 7 ...
Individually, ruby-bearing zones can measure up to 20 metres in thickness and up to 200 metres in length. They may occur as single showings, but are usually found in alignments of multiple showings, with some of the occurrences such as The Ruby Island Line collectively up to 3.5 kilometres in strike length, and as much as 100 metres in width. [5]