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Synthetic alexandrite is an artificially grown crystalline variety of chrysoberyl, composed of beryllium aluminum oxide (BeAl 2 O 4). The name is also often used erroneously to describe synthetically-grown corundum that simulates the appearance of alexandrite , but with a different mineral composition.
Alexandrite in sizes over three carats are very rare. Today, several labs can produce synthetic lab-grown stones with the same chemical and physical properties as natural alexandrite. Several methods can produce flux-grown alexandrite, Czochralski (or pulled) alexandrite, and hydrothermally-produced alexandrite.
Tairus (Russian: Тайрус, a portmanteau of Тайско and Русский ()) is a synthetic gemstone manufacturer. It was formed in 1989 as part of Mikhail Gorbachev's perestroika initiative to establish a joint venture between the Russian Academy of Sciences and Tairus Created Gems Co Ltd. of Bangkok, Thailand.
“Lab-grown diamonds are created in state-of-the-art laboratories, rather than being mined from the earth,” says Pahlajani. “They undergo the exact same process that carbon does in nature to ...
[2] [3] A U.S. Marine Hospital was established in Cincinnati in 1882 in the former Kilgour Mansion, built around 1815 by David Kilgour. [ 4 ] [ 5 ] The hospital closed in 1905, [ 4 ] but the 1912 PHS law ( Pub. L. 62–265 ) led to the building being reopened as a Field Investigation Station for water pollution research.
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