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The East Wenatchee Clovis Site (also called the Richey-Roberts Clovis Site or the Richey Clovis Cache) is a deposit of prehistoric Clovis points and other implements, dating to roughly 11,000 radiocarbon years before present or about 13,000 calendar years before present, found near the city of East Wenatchee, Washington in 1987.
The mine shaft was 280 feet (85 m) deep and contained two Yogo ore-bearing veins. [84] The portion of the dike they had mined was an extension of the main dike. [85] The Vortex Mine, renamed Yogo Creek Mining, [18] was successful for years but eventually declined and closed in 2004. [85] A 0.19-carat (0.038 g) diamond cut cornflower blue Yogo ...
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [80] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
This a new niche in the market as of 2016 as a collaborative effort to bring American mined gemstones to the market from a network of USA mining teams. Amanda Adkins launched this website in an effort to help the gemstone mining families in America. [1] [2] Dwayne Hall mines aquamarine on Colorado's Mount White.
Gemfields Group Ltd (formerly Pallinghurst Resources Limited) is a British mining company incorporated in Guernsey and headquartered in London, United Kingdom, and is a supplier of coloured gemstones. [5] The company specializes in the mining, processing and sale of coloured gemstones, in particular emeralds and rubies. The group sells rough ...
Because of this pricing system large gemstones are worth more than a comparable mass of smaller stones. For this reason a successful diamond mining operation can't rely solely on the mass of carats recovered. The Kelsey Lake mine has produced some large stones. [14] In 1994 a 14.2-carat, gem-quality white diamond was recovered.
Raw diamonds from the mines were typically transported to Golconda—now the western part of Hyderabad— [28]) for skilled lapidary, enhancement, further evaluation, and sale. [ 17 ] [ 19 ] [ 20 ] The art of macle , which is a form of rough diamond that is used to produce jewellery, was first developed in the Golconda region. [ 29 ]
Evalyn McLean (née Walsh; August 1, 1886 – April 26, 1947) was an American mining heiress and socialite, famous for reputedly being an owner of the 45-carat (9.0 g) Hope Diamond (which was bought in 1911 for US$180,000 from Pierre Cartier), as well as another famous diamond, the 94-carat (18.8 g) Star of the East.
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