Cassiterite (Tin Oxide), El Paso County, Texas
Cassiterite (Tin Dioxide) Locality: Franklin Mountains, El Paso County, Texas Occurs in veins in pink granite. Chemical Formula: SnO2 Crystal System: Tetragonal Specimen Weight: 150 grams In the Arthur E. Smith Collection, Wheaton College, Wheaton, Illinois. Additional Information: Reportedly 8 - 10 tons of Tin was produced by the El Paso Tin Mining and Smelting Co. between March 1909 and late 1910 ( Sydney H. Ball report 1936).
Tenorite (a Copper Oxide), El Paso County, Texas
Tenorite (aka Melaconite) County: El Paso County Chemical formula: CuO Crystal System: Monoclinic Specimen size: 3 x 1.75 x 2 inches Specimen weight: 336 grams Collection reference: TMM 2859 In the Jackson School of Geosciences at the University of Texas at Austin.
Cassiterite (Tin Oxide), El Paso County, Texas
Cassiterite (Tin Dioxide) closeup Field of view = 1 inch Locality: El Paso County, Texas (Franklin Mountains) Chemical Formula: SnO2 Occurs in veins in pink granite Chemical Formula: SnO2 Crystal System: Tetragonal Specimen Weight: 150 grams In the Arthur E. Smith Collection, Wheaton College, Wheaton, Illinois. Additional Information: Reportedly 8 - 10 tons of Tin was produced by the El Paso Tin Mining and Smelting Co. between March 1909 and late 1910 ( Sydney H. Ball report 1936).
Chalcopyrite (Copper Sulfide), El Paso County, Texas
Chalcopyrite is an important Cu ore. Locality: labeled as ore from the Pecos Mining Company, Sierra Diablo Range, in El Paso County, Texas. Chemical Formula: CuFeS2 Crystal System: Tetragonal Specimen size: 5 x 5 x 3 cm Specimen weight: 375 grams Collection ID: TMM-1765 Mineral resources of the United States, Calendar Year 1909 (p. 455) reports that the Hazel Mine in the Sierra Diablo range was and important Copper and Silver producer, and earlier reports (1902) report assays of 44% Cu from the Hazel Mine.
Chalcopyrite and Tenorite closeup (Copper Ores), El Paso County, Texas
Chalcopyrite is an important Cu ore. Tenorite is found in oxidized zones. Locality: labeled as ore from the Pecos Mining Company, Sierra Diablo Range, in El Paso County, Texas. Chemical Formula: CuFeS2 (Chalcopyrite) and CuO (Tenorite) Crystal System: Tetragonal Specimen size: 5 x 5 x 3 cm Specimen weight: 375 grams Collection ID: TMM-1765 Mineral resources of the United States, Calendar Year 1909 (p. 455) reports that the Hazel Mine in the Sierra Diablo range was and important Copper and Silver producer, and earlier reports (1902) report assays of 44% Cu from the Hazel Mine.
Galena (Lead ore), El Paso County, Texas
Galena (PbS) Location: listed as found on the west side of the Quitman Mountains from the McKinney Claims County: El Paso, County Chemical formula: PbS Crystal System: Isometric Specimen size: 4 x 3 x 2 inches Specimen weight: 966 grams Collection reference: TMM 1547