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The Western North Carolina town possesses the world’s most pure quartz, making its two mine operations essential to the production of semiconductors. Largest Spruce Pine quartz mine restarts ...
Inclusions can be found in these crystals that provide clues to the origins of the Herkimer diamonds. Found within the inclusions are solids, liquids (salt water or petroleum), gases (most often carbon dioxide), two- and three-phase inclusions, and negative (uniaxial) crystals. A black hydrocarbon is the most common solid inclusion.
Following a new study linking quartz countertops to silicosis, California is considering banning the engineered stone Quartz countertops, a staple in many high-end kitchens, are being linked to an ...
Thanks to David Yurman, the American Museum of Natural History has opened a new exhibit of sparkling quartz crystals. 4,000 Pounds of Crystal Mined in Arkansas Are Now on Glorious Display in NYC ...
Lynch Quarry Site, North Dakota, NRHP-listed and a U.S. National Historic Landmark, a flint quarry that was "a major source of flint found at archaeological sites across North America, and it has been estimated that the material was mined there from 11,000 B.C. to A.D. 1600."
Gold-quartz veins are found in the schists and gneiss. [1]: 19, 27, 48 Gold veinlets (they appear white) in a sample of gneiss from the Battle Branch Mine in Lumpkin County. The largest quantities of gold found in the eastern United States were found in the Georgia Gold Belt, extending from eastern Alabama to Rabun County, Georgia.
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Cape May diamonds (sometimes capitalized "Diamonds") are quartz pebbles found on the beaches of Cape May Point, New Jersey. The pebbles are sometimes collected, cut and polished to resemble diamonds, then sold locally as souvenirs. Cape May diamonds are usually collected by beach combing and are most abundant at Higbee and Sunset beaches in ...