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2. Spruce Pine Mining District - Wikipedia

   en.wikipedia.org/wiki/Spruce_Pine_Mining_District

   Spruce Pine Mining District. The Spruce Pine Mining District is a swath of the valley of the North Toe River in the Blue Ridge Mountains of northwestern North Carolina. The area is mined for its mica, kaolin, quartz and feldspar. [1] Spruce Pine district is one of the largest suppliers of high-purity quartz, which is used in the manufacture of ...

3. Bannerstone - Wikipedia

   en.wikipedia.org/wiki/Bannerstone

   Bannerstone, Ferruginous quartz, 2nd millennium BC. Found in Illinois. Bannerstones are artifacts usually found in the Eastern United States that are characterized by a centered hole in a symmetrically shaped carved or ground stone. The holes are typically 1⁄4 " to 3⁄4 " in diameter and extend through a raised portion centered in the stone.

4. List of tallest buildings in Columbus, Ohio - Wikipedia

   en.wikipedia.org/wiki/List_of_tallest_buildings...

   Skyline of Columbus (Use cursor to identify buildings) Four of the city's five tallest buildings are around Capitol Square. The tallest building by height in the U.S. city of Columbus, Ohio, is the 41-story Rhodes State Office Tower, which rises 629 feet (192 m) and was completed in 1973. [1]

5. 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 ...

6. Quartzolite - Wikipedia

   en.wikipedia.org/wiki/Quartzolite

   Quartzolite. Quartzolite or silexite is an intrusive igneous rock, in which the mineral quartz is more than 90% of the rock's felsic mineral content, with feldspar at up to 10%. [1]: 135 [2] Typically, quartz forms more than 60% of the rock, [3] the rest being mostly feldspar although minor amounts of mica or amphibole may also be present. [2 ...

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 ...

8. AOL

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9. 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 ...