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  2. Spruce Pine Mining District - Wikipedia

    en.wikipedia.org/wiki/Spruce_Pine_Mining_District

    Spruce Pine district is one of the largest suppliers of high-purity quartz, which is used in the manufacture of silicon for integrated circuits. [2] The district is named after the town of Spruce Pine , which is located in the middle of the region and is the hub of major mining activity there.

  3. Caesarstone - Wikipedia

    en.wikipedia.org/wiki/Caesarstone

    Aerial view of Caesarstone factory near Caesarea's Roman amphitheater Caesarstone's production line Caesarstone's quality control. Caesarstone Ltd. manufactures quartz surfaces in three different sites, two in Israel – Kibbutz Sdot Yam and the Bar Lev Industrial Zone near Karmiel, and in its new plant in Richmond Hill, GA, USA, since May 27, 2015 and sources products from third party ...

  4. Coldspring (company) - Wikipedia

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

    Coldspring is a quarrier and fabricator of granite and other natural stone and a bronze manufacturing company in the United States. [1] Coldspring serves the memorials market, the design and architectural market and distributes slabs for the residential market, industrial products, raw quarry blocks, and diamond tools.

  5. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

  6. Quartz arenite - Wikipedia

    en.wikipedia.org/wiki/Quartz_arenite

    Quartz arenite makes up the Prospect Mountain Quartzite on top of Doso Doyabi, Nevada. A quartz arenite or quartzarenite is a sandstone composed of greater than 90% detrital quartz. [1] Quartz arenites are the most mature sedimentary rocks possible, and are often referred to as ultra- or super-mature, and are usually cemented by silica. They ...

  7. Permanente Quarry - Wikipedia

    en.wikipedia.org/wiki/Permanente_Quarry

    A ferrosilicon plant operated at Permanente from 1942–1944 to supply the Manteca operation. Quartz from White Rock in Mariposa County, supplemented with quartz gravel from the Bear River in Placer County, Alabama and local oil refinery coke, semi-anthracite Oklahoma coal and scrap iron were combined in an electric furnace to make ferrosilicon ...

  8. Quartzite - Wikipedia

    en.wikipedia.org/wiki/Quartzite

    Quartzite can have a grainy, glassy, sandpaper-like surface. Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. [1] [2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.

  9. Fused quartz - Wikipedia

    en.wikipedia.org/wiki/Fused_quartz

    The terms fused quartz and fused silica are used interchangeably but can refer to different manufacturing techniques, resulting in different trace impurities. However fused quartz, being in the glassy state, has quite different physical properties compared to crystalline quartz despite being made of the same substance. [2]