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  2. Ruby - Wikipedia

    en.wikipedia.org/wiki/Ruby

    The Montepuez ruby mine in northeastern Mozambique is situated on one of the most significant ruby deposits in the world, [22] although, rubies were only discovered here for the first time in 2009. In less than a decade, Mozambique has become the world's most productive source for gem-quality ruby.

  3. List of rubies by size - Wikipedia

    en.wikipedia.org/wiki/List_of_rubies_by_size

    Some gemstones that are popularly or historically called rubies, such as the Black Prince's Ruby in the British Imperial State Crown, are actually spinels. These were once known as "Balas rubies". The quality of a ruby is determined by its color, cut, and clarity, which, along with carat weight, affect its value. The brightest and most valuable ...

  4. Liberty Bell Ruby - Wikipedia

    en.wikipedia.org/wiki/Liberty_Bell_Ruby

    The Liberty Bell Ruby is a sculpture crafted from the world's largest mined ruby, [1] discovered in East Africa in the 1950s. [2] It weighs four pounds, is eight and a half thousand carats (8,500), and is sculpted into a miniature form of the Liberty Bell. It has 50 diamonds set in it and is valued at $2 million.

  5. Timeline of the discovery and classification of minerals

    en.wikipedia.org/wiki/Timeline_of_the_discovery...

    The chemical elements were discovered in identified minerals and with the help of the identified elements the mineral crystal structure could be described. One milestone was the discovery of the geometrical law of crystallization by René Just Haüy , a further development of the work by Nicolas Steno and Jean-Baptiste L. Romé de l'Isle (the ...

  6. Estrela de Fura - Wikipedia

    en.wikipedia.org/wiki/Estrela_de_Fura

    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.

  7. Rosser Reeves Ruby - Wikipedia

    en.wikipedia.org/wiki/Rosser_Reeves_Ruby

    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 ...

  8. Verneuil method - Wikipedia

    en.wikipedia.org/wiki/Verneuil_method

    One of Verneuil's sources of inspiration for developing his own method was the appearance of synthetic rubies sold by an unknown Genevan merchant in 1880. These "Geneva rubies" were dismissed as artificial at the time, but are now believed to be the first rubies produced by flame fusion, predating Verneuil's work on the process by 20 years.

  9. Yogo sapphire - Wikipedia

    en.wikipedia.org/wiki/Yogo_sapphire

    "Yogo sapphire" is the preferred term for gems found in the Yogo Gulch, whereas "Montana sapphire" generally refers to gems found in other Montana locations. More gem-quality sapphires are produced in Montana than anywhere else in North America. Sapphires were first discovered in Montana in 1865, in alluvium along the Missouri River. Finds in ...