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2. 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. [18] More gem-quality sapphires are produced in Montana than anywhere else in North America. [18] Montana sapphires come in a variety of colors, though rubies are rare. [16] [18] [23]

3. List of individual gemstones - Wikipedia

   en.wikipedia.org/wiki/List_of_individual_gemstones

   Logan Sapphire; Star of Bombay, given to Mary Pickford by Douglas Fairbanks, Sr; Star of India; Stuart Sapphire; Black Star of Queensland; Star of Adam, with a weight of 1,404.49 carats (280.898 g), it is the largest star sapphire in the world. Queen Marie of Romania Sapphire

4. List of sapphires by size - Wikipedia

   en.wikipedia.org/wiki/List_of_sapphires_by_size

   "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".

5. Queen Camilla Wears Sapphire Jewelry Set That Previously ...

   www.aol.com/lifestyle/queen-camilla-wears...

   Queen Camilla, 76, had us going ooh la la with the stunning set of diamonds she wore during a recent trip to the Palace of Versailles. The queen consort and her husband, King Charles III, 74, are ...

6. List of U.S. state minerals, rocks, stones and gemstones

   en.wikipedia.org/wiki/List_of_U.S._state...

   Montana Agate (1969) Nebraska [45] Prairie agate (1967) Blue chalcedony (1967) Nevada [46] [47] Metal: Silver (1977); Nevada's nickname is the Silver State: Sandstone (1987) Precious Gemstone: Virgin Valley black fire opal (1987) Semiprecious Gemstone: Nevada turquoise (1987) New Hampshire [48] Beryl (1985) Granite (1985); New Hampshire's ...

7. Richard W. Hughes - Wikipedia

   en.wikipedia.org/wiki/Richard_W._Hughes

   In 2012, together with his family, he established a Gemological laboratory in Bangkok called Lotus Gemology. In 2017, Lotus Gemology published Hughes' book Ruby & Sapphire: A Gemologist's Guide, [7] covering the corundum gem species. [8] [9] In 2019, Tongji University created an exhibit centering on Lotus Gemology's photography. [10]