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Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, it occurs in other colors, including gray and black, and also can be colorless. A pinkish orange variety of sapphire is called padparadscha.
A rare type of sapphire, padparadscha sapphire, is pink-orange. The name "corundum" is derived from the Tamil-Dravidian word kurundam (ruby-sapphire) (appearing in Sanskrit as kuruvinda). [8] [9] Because of corundum's hardness (pure corundum is defined to have 9.0 on the Mohs scale), it can scratch almost all other minerals.
Also on display was the 563 carat (113 g) Star of India, the largest, and most famous, star sapphire in the world. It was discovered over 300 years ago in Sri Lanka, [citation needed] most likely in the sands of ancient river beds from where sapphires continue to be found today. It was donated to the museum by the financier J.P. Morgan.
Gem quality hibonite has been found only in Myanmar. [73] Red Beryl - discovered in 1940. Red beryl or bixbite was discovered in an area near Beaver, Utah in 1904 and named after the American mineralogist Maynard Bixby. Jeremejevite was discovered in 1883 in Russia and named after its discoverer, Pawel Wladimirowich Jeremejew (1830–1899).
"The Grand Sapphire of Louis XIV and The Ruspoli Sapphire". Gems & Gemology. 51 (4). Gemological Institute of America. ISSN 0016-626X; Gemological Institute of America (2019). "sapphire". Gemological Institute of America; Howard, Bill (December 2, 2011). "The rush job from Hell".
The Verneuil method (or Verneuil process or Verneuil technique), also called flame fusion, was the first commercially successful method of manufacturing synthetic gemstones, developed in the late 1883 [1] by the French chemist Auguste Verneuil.
A rare type of sapphire, padparadscha sapphire, is pink-orange. The name "corundum" is derived from the Tamil - Dravidian word kurundam (ruby-sapphire) (appearing in Sanskrit as kuruvinda ). Because of corundum's hardness (pure corundum is defined to have 9.0 on the Mohs scale ), it can scratch almost all other minerals.
Sapphire#Padparadscha From a merge : This is a redirect from a page that was merged into another page. This redirect was kept in order to preserve the edit history of this page after its content was merged into the content of the target page.
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