1. Minerals of Texas
  2. Minerals Listed by Texas County

Mason County

Mineral specimens found in Mason County, Texas.
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  • Fluorite, Mason County, Texas

    Fluorite, Mason County, Texas

    Fluorite (or Fluorspar) is a Calcium Fluoride Locality: Mason County, Texas, noted as found in the "Fredonia area" Chemical Formula: CaF2 Crystal System: Isometric Specimen size: 1.5 in x 1.5 in x 1.5 in Specimen weight: 33 grams On display in the Arthur E. Smith Collection, Wheaton College, Wheaton, Illinois.

  • Topaz, Mason County, Texas

    Topaz, Mason County, Texas

    Topaz Mason County, Texas Chemical Formula: Al2(SiO4)(F,OH)2 Crystal System: Orthorhombic (short to long prismatic crystals) Specimen Dimensions: 4 cm x 4 cm x 4 cm Specimen Weight: 206 grams Specimen ID: B-1336 Topaz is the state gem of Texas. This specimen circled the earth on one of NASA's space shuttles. From the Colonel E.M. Barron Mineral Collection

  • Topaz (river worn), Mason County, Texas

    Topaz (river worn), Mason County, Texas

    Topaz, typical rounded specimens collected in Mason County, Texas Chemical forumula: Al2SiO4F Crystal System: Orthorhombic Specimen weight: 8 grams (total, all 4 crystals) Specimen size: Top left (brown crystal) long dimension = 15 mm, bottom right (yellow crystal) long dimension = 13 mm From the Middleton Collection (AGMS member).

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        Topaz, Mason County, Texas
        Topaz (river worn), Mason County, Texas