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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. 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. List of quarries in the United States - Wikipedia

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

   Tataga-Matau Fortified Quarry Complex (AS-34-10), near the village of Leone on Tutuila in American Samoa, NRHP-listed, "a complex consisting of a series of basalt quarries and structures that archaeologists have interpreted as having a military defensive purpose. The site has been known since at least 1927, and was first formally surveyed in ...

5. The Eye of God (Big Bear) - Wikipedia

   en.wikipedia.org/wiki/The_Eye_of_God_(Big_Bear)

   The Eye of God (Serrano: Hatauva) [1] is a quartz dome which is a landmark in the Baldwin Lake area near Big Bear City, California.It is a megalith which is a sacred tribal landmark for the native Yuhaaviatam "People of the Pines," a clan of Serrano people who have lived in the region for at least 2,000 years.

6. 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 ...

7. Quartzite - Wikipedia

   en.wikipedia.org/wiki/Quartzite

   Quartzite. 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. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and ...