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A star sapphire is a type of sapphire that exhibits a star-like phenomenon known as asterism; red stones are known as "star rubies". Star sapphires contain intersecting needle-like inclusions following the underlying crystal structure that causes the appearance of a six-rayed "star"-shaped pattern when viewed with a single overhead light source.
Ruspoli Sapphire: 136.9 carats (27.38 g) Stuart Sapphire: Sri Lanka 104 carats (20.8 g) Blue Tower of London: Bismarck Sapphire: Myanmar: 98.56 carats (19.712 g) Table Blue National Museum of Natural History, Washington James J. Hill Sapphire: 22.66 carats (4.532 g) Cornflower National Museum of Natural History, Washington
SAPPHIRE (health care) The Situational Awareness and Preparedness for Public Health Incidences and Reasoning Engines (SAPPHIRE) is a semantics -based health information system capable of tracking and evaluating situations and occurrences that may affect public health. It was developed in 2004 by Dr. Parsa Mirhaji at the University of Texas ...
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Project Sapphire was a successful 1994 covert operation of the United States government in cooperation with the Kazakhstan government to reduce the threat of nuclear proliferation by removing nuclear material from Kazakhstan as part of the Cooperative Threat Reduction Program, which was authorized by the Soviet Nuclear Threat Reduction Act of 1991.
The firm was founded in 1996 as the venture capital arm of multinational software conglomerate SAP and spun out as an independent company in 2011, rebranding to Sapphire Ventures in 2014. At the time, Sapphire Ventures managed $1.4 billion and had invested in more than 125 companies, with 10 companies going public and 17 getting acquired.
Titanium-sapphire refers to the lasing medium, a crystal of sapphire (Al 2 O 3) that is doped with Ti 3+ ions. A Ti:sapphire laser is usually pumped with another laser with a wavelength of 514 to 532 nm, for which argon - ion lasers (514.5 nm) and frequency-doubled Nd:YAG , Nd:YLF , and Nd:YVO lasers (527–532 nm) are used.
The Logan Sapphire brooch, National Museum of Natural History, Washington, D.C. The Logan Sapphire is a 422.98-carat (84.596 g) sapphire from Sri Lanka.One of the largest blue faceted sapphires in the world, it was owned by Sir Victor Sassoon and then purchased by M. Robert Guggenheim as a gift for his wife, Rebecca Pollard Guggenheim, who donated the sapphire to the Smithsonian Institution in ...