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Feldspar
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131	Mount Apatite Quarries - Eastern Group and Turner Quarry Town: Auburn, Androscoggin County Base map: Minot 7.5’ quadrangle Contour interval: 10 feet Mount Ap a tite Quar ries - East ern Group Add to Reading List Source URL: www.maine.gov Language: English - Date: 2013-07-26 10:00:00 Borate minerals Cyclosilicates Igneous rocks Elbaite Pollucite Feldspar Pegmatite Tourmaline Lepidolite Crystallography Silicate minerals Chemistry
132	60 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2007 had an estimated value of about $45 million. The three leading producers accounted for abou Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2008-01-31 14:51:48 Feldspar Nepheline syenite Syenite Industrial mineral Mica Petrology Crystallography Tectosilicates
133	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2009 was valued at about $36 million. The three leading producers accounted for about 57% of the Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2010-01-27 08:36:12 Igneous petrology Feldspar Tectosilicates Nepheline syenite Granite Mica Aluminium Petrology Chemistry Crystallography
134	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2013 was valued at about $37.7 million. The three leading producers accounted for about 87% of p Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2014-03-07 14:53:44 Dielectrics Feldspar Tectosilicates Nepheline syenite Glass recycling Recycling Mica Glass Granite Chemistry Petrology Crystallography
135	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2011 was valued at about $43 million. The three leading producers accounted for about 71% of the Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2012-01-24 10:53:56 Business Feldspar Tectosilicates Glass recycling Nepheline syenite Mica Glass Recycling Ceramic Chemistry Dielectrics Matter
136	56 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2008 had an estimated value of about $36 million. The three leading producers accounted for abou Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2009-01-29 14:39:42 Feldspar Tectosilicates Nepheline syenite Mica Granite Aluminium Petrology Chemistry Crystallography
137	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2012 was valued at about $39 million. The three leading producers accounted for about 83% of the Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2013-01-29 11:09:23 Feldspar Tectosilicates Recycling Mica Nepheline syenite Glass recycling Granite Aluminium Chemistry Petrology Crystallography
138	2006 Minerals Yearbook FELDSPAR AND NEPHELINE SYENITE U.S. Department of the Interior U.S. Geological Survey Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2007-09-17 12:57:33 Nepheline syenite Tectosilicates Industrial mineral Leucite Unimin Feldspar Syenite Aplite Granite Petrology Igneous petrology Crystallography
139	2008 Minerals Yearbook FELDSPAR U.S. Department of the Interior U.S. Geological Survey Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2012-08-15 09:14:11 Igneous rocks Economic geology Feldspathoid Nepheline syenite Tectosilicates Unimin Industrial mineral Feldspar Leucite Petrology Crystallography Igneous petrology
140	62 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2005 had an estimated value of about $44 million. The three leading producers accounted for abou Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2006-01-18 13:31:31 Tectosilicates Igneous petrology Nepheline syenite Granite Mica Recycling Petrology Crystallography Feldspar

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