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Moissanite (/ ˈmɔɪsəˌnaɪt /) [ 5 ] is naturally occurring silicon carbide and its various crystalline polymorphs. It has the chemical formula SiC and is a rare mineral, discovered by the French chemist Henri Moissan in 1893. Silicon carbide or moissanite is useful for commercial and industrial applications due to its hardness, optical ...
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 v
Spiro Mounds (34 LF 40) [ 3 ] is an Indigenous archaeological site located in present-day eastern Oklahoma. The site was built by people from the Arkansas Valley Caddoan culture. [ 4 ] that remains from an American Indian culture that was part of the major northern Caddoan Mississippian culture. The 80-acre site is located within a floodplain ...
The Arbuckle Mountains are an ancient mountain range in south-central Oklahoma in the United States.They lie in Murray, Carter, Pontotoc, and Johnston counties. [1] The granite rocks of the Arbuckles date back to the Precambrian Eon some 1.4 billion years ago which were overlain by rhyolites during the Cambrian Period.
Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties. High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1] As a result, the gemstone's color may be ...
The McLemore Site, designated by the Smithsonian trinomial 34WA5, is a prehistoric archaeological site of the Southern Plains villagers located near Colony in Washita County, Oklahoma. It is the site of a prehistoric Plains Indian village, dating from AD 1330-1360, during the Washita River phase. [1] The site is of historic importance for being ...
In fact, as she told People in September, it's her outlook on health and wellness that has her being open and nostalgic about life more than she ever has before. "I love being able to talk about ...
As a gemstone used in jewelry, silicon carbide is called "synthetic moissanite" or just "moissanite" after the mineral name. Moissanite is similar to diamond in several important respects: it is transparent and hard (9–9.5 on the Mohs scale , compared to 10 for diamond), with a refractive index between 2.65 and 2.69 (compared to 2.42 for ...
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