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Ruby is a pinkish-red-to-blood-red-colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. [3]
At the time the ruby then weighed just over 140 carats (28 g), but was very heavily scratched, and a few carats were removed in the re-polishing. The re-polishing also helped to center the stone's star. Articles in the New York World-Telegram and The Sun in 1953 mentioned this fabulous gemstone. The Rosser Reeves Ruby is on display at the ...
National Museum of Natural History [3] DeLong Star Ruby: Burma: 1930 100.32 carats (20.064 g) American Museum of Natural History [4] Garrard's Red Ruby Burma: 40.63 carats (8.126 g) [5] Sunrise Ruby: 25.59 carats (5.118 g) [6] Carmen Lúcia Ruby: Burma: 1930s 23.1 carats (4.62 g) National Museum of Natural History [7] Elizabeth Taylor Ruby
A ruby is known as a "star ruby" if it contains an asterism (distinctive star-shaped light refraction) in the gem. The Neelanjali Ruby is the biggest star ruby in the world. It has 12 points, which makes it a double-star ruby. [citation needed]
The star-effect may be also caused by the inclusions of hematite. In black star sapphire hematite needles formed parallel to the faces of the second order prism produce asterism. Some star sapphires from Thailand contain both hematite and rutile needles forming a 12-ray star. [3] Star-stones were formerly regarded with much superstition. [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.
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