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2. List of quarries in the United States | Wikipedia

   en.wikipedia.org/wiki/List_of_quarries_in_the...

   W.N. Flynt Granite Co., in Monson, Massachusetts, a granite quarry that opened in 1809 and operated until 1935. By 1888, the company employed over 200 workers, and produced about 30,000 tons of granite per year. Quincy Quarries Reservation, in Quincy, Massachusetts, producer of granite from 1826 to 1963, including for the Bunker Hill Monument.

3. Cambria (company) | Wikipedia

   en.wikipedia.org/wiki/Cambria_(company)

   Number of employees. 1,934 (2020 [1]) Website. cambriausa.com. Cambria (keɪm-bri-ə) is a producer of engineered quartz surfaces in the United States. [2] It is located in Le Sueur, Minnesota, with additional facilities throughout the United States, and in Ontario, Canada. [3] Cambria is privately held and owned by the Davis family.

4. Quartzite | Wikipedia

   en.wikipedia.org/wiki/Quartzite

   Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface is glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization, causing streaks and lenses to form within the quartzite. [1 ...

5. Battelle Memorial Institute | Wikipedia

   en.wikipedia.org/wiki/Battelle_Memorial_Institute

   Battelle Memorial Institute (or simply Battelle) is a private nonprofit applied science and technology development company headquartered in Columbus, Ohio. The institute opened in 1929 but traces its origins to the 1923 will of Ohio industrialist Gordon Battelle which provided for its creation and his mother Annie Maude Norton Battelle who left ...

6. Marble Cliff Quarry Co. | Wikipedia

   en.wikipedia.org/wiki/Marble_Cliff_Quarry_Co.

   In 1913, Marble Cliff Quarries Co. was founded and shortly consolidated quarrying activities with the merger of Casparis Stone, Scioto Stone, Kiefer Stone, and Woodruff and Pausch Stone. John W. Kaufman was named president of the company and H.J. Kaufman vice president. [2] The company grew through the expansion of stone grades from one to six ...

7. Quartz | Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...