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An amethyst geode that formed when large crystals grew in open spaces inside the rock. The largest amethyst geode found as of 2007 was the Empress of Uruguay, found in Artigas, Uruguay in 2007. It stands at a height of 3.27 meters, lies open along its length, and weighs 2.5 tons. Amethyst is also found and mined in South Korea. [19]
January 1916, scientific journal: American Mineralogist, first issue. 1916, X-ray powder diffraction: "Peter Debye (1884–1966) – Paul Scherrer (1890–1969) powder method". 1919, founding of the Mineralogical Society of America (MSA). Georg Menzer (1897–1989) solves the first crystal structure of garnet (1925). [22]
In 1969, an emerald of 1,438 carats (0.2876 kg) was uncovered, the largest yet found in North America. The stone was named the Stephenson Emerald in honor of John A. D. Stephenson, a late 19th-century collector instrumental in the discovery of the first North Carolina emerald and the first world discovery of hiddenite.
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Its initial American broadcast was viewed by approximately 1.693 million viewers. It received a Nielsen household rating of 0.46, meaning that it was seen by 0.46% of all households. [4] The episode was the second of a two-part episode which was the first episode of the "In Too Deep" special event in which five new episodes aired across four weeks.
Its initial American broadcast was viewed by approximately 1.693 million viewers. It received a Nielsen household rating of 0.46, meaning that it was seen by 0.46% of all households. [4] The episode was the first of a two-part episode which was the first episode of the "In Too Deep" special event in which five new episodes aired across four weeks.
The Empress of Uruguay is the world's largest amethyst geode, standing at a height of 3.27 meters. It is open along its length and weighs 2.5 tons in its current state. It was discovered in 2007 in the Artigas department, Uruguay by the Uruguayan mining company Le Stage Minerals. Its estimated value is US $190,000, although it is not for sale.
Taaffeite (/ ˈ t ɑː f aɪ t /; BeMgAl 4 O 8) is a mineral, named after its discoverer Richard Taaffe (1898–1967) who found the first sample, a cut and polished gem, in October 1945 in a jeweler's shop in Dublin, Ireland. [4] [5] As such, it is the only gemstone to have been initially identified from a faceted stone.