1. <th id="9jc4d"><kbd id="9jc4d"><rt id="9jc4d"></rt></kbd></th>

    2. <progress id="9jc4d"><big id="9jc4d"><noframes id="9jc4d"></noframes></big></progress><dd id="9jc4d"><big id="9jc4d"><video id="9jc4d"></video></big></dd>

    3. <th id="9jc4d"><pre id="9jc4d"></pre></th>
    4. mineral specimens
      rare minerals
      mineral dealer
      systematic minerals
      Black Hills minerals
      fine minerals
      mineral dealer
      Dana minerals
      IMA minerals
      mineral collections
      rock and minerals
      gem crystal
      0 item @ $0.00  

      Southeast US Phosphates

      Thursday, 23 April 2020 08:00 PM

      Introducing the "Southeast US Phosphates" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including beraunite, cacoxenite and more from places like Three Oaks Gap, Polk Co., Arkansas, United States, Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States, Brewer mine, Cedartown, Polk Co., Georgia, United States, and Boar Tusk Mtn., Polk Co., Arkansas, United States.

      Beraunite

      with Kidwellite - #BN53060
      Locality
      Three Oaks Gap, Polk Co., Arkansas, United States 
      Formula
      Fe2+Fe3+5(PO4)4(OH)5·6H2
      Availability
      Sold
      Size
      6.5 x 4 x 3 cm - Sm Cabinet 
      Tagged
      phosphate  

      The Beraunite on this specimen is perhaps unsurpassed by any other of the like. I have others on this update but these crystals seem to be sharper and more distinct. The crystals are a deep red, prismatic and striated and measure to 6 or 7mm. On the right side the Kidwellite covers the Beraunite with a dark green color.

      Throughout this special edition I am keeping the historic identification as "Beraunite". Several of the Mindat localities in this part of the USA have switched the ID to Eleonorite. It is impossible to discern the the differnces visually. The two are of the same composition. Only the stoichiometery is diiferent. And it's a very subtle difference between ferrous and ferric iron.


      Beraunite

      Formula
      Fe2+Fe3+5(PO4)4(OH)5·6H2
      Crystal System
      Monoclinic 
      Crystal Habit
      Druse, Radial, Globular 
      Cleavage
      Good, None, None 
      Luster
      Vitreous - Dull 
      Color
      green, greenish brown, gray green, dark greenish brown, dark red 
      Streak
      green brown 
      Class
      Monoclinic - Prismatic 
      Hardness
      Collection
      Dr. Buford Nichols Collection
      Mineralpedia
      View Beraunite
      On Dakota Matrix
      Previously Sold Beraunite
      On Dakota Matrix
      Other Available Beraunite
      WebMineral
      View Beraunite
      Mindat
      View Beraunite

      Beraunite

      with Kidwellite - #BN53075
      Locality
      Three Oaks Gap, Polk Co., Arkansas, United States 
      Formula
      Fe2+Fe3+5(PO4)4(OH)5·6H2
      Availability
      Sold
      Size
      10 x 9 x 5 cm - Cabinet 
      Tagged
      phosphate  

      A crazy rich specimen with bands of superb, deep red, lath-like crystals of Beraunite to 6mm. The bands are up to 1.3cm. On the Beraunite are globular Kidwellite. The matrix is a "novaculite", which is a localized term for siliceous chert. 

      It was collected by Meredith York, one of the members of the famous "Coon Creek" gang. Dr. Buford Nichols, one of the members, obtained it from York. This group along with Michael Howard served the mineral community well and was the source of many of these fine specimens. Howard wrote a great book called "Mineral Species of Arkansas - A Digest" published in 1987 by the Arkansas Geological Survy, Bulletin 23. I would highly recommend it as it is concise and well written.


      Beraunite

      Formula
      Fe2+Fe3+5(PO4)4(OH)5·6H2
      Crystal System
      Monoclinic 
      Crystal Habit
      Druse, Radial, Globular 
      Cleavage
      Good, None, None 
      Luster
      Vitreous - Dull 
      Color
      green, greenish brown, gray green, dark greenish brown, dark red 
      Streak
      green brown 
      Class
      Monoclinic - Prismatic 
      Hardness
      Collection
      Dr. Buford Nichols Collection
      Mineralpedia
      View Beraunite
      On Dakota Matrix
      Previously Sold Beraunite
      On Dakota Matrix
      Other Available Beraunite
      WebMineral
      View Beraunite
      Mindat
      View Beraunite

      Cacoxenite

      #DO46634
      Locality
      Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States 
      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Availability
      Sold
      Size
      6 x 5 x 3 cm - Sm Cabinet 
      Tagged
      phosphate  

      Beautiful full spherical and radiating crystal groups of Cacoxenite less than 1mm in size on a red iron-oxide matrix. It is not as rich as some of the others in this update.

      The specimen was collected by the late Don Owens. Don was prolific mineral collector, who was a member of the "Coon Creek Association", which also included some of the best mineralogists of our time: Mike Howard, the late Henry de Linde, the late Al Kidwell, the late Art Smith, and Buford Nichols. I never had the pleasure of meeting Don, however Henry de Linde hosted me while I viewed his collection several years ago. The other Union Carbide specimens in this Special Edition were also collected by Don Owens. 


      Cacoxenite

      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Crystal System
      Hexagonal 
      Crystal Habit
      Radial, Acicular, Stellate 
      Cleavage
      None, None, None 
      Luster
      Silky 
      Color
      brownish yellow, green, yellow, golden yellow, red yellow 
      Streak
      yellow 
      Class
      Hexagonal - Dihexagonal Dipyramidal 
      Fracture
      Uneven 
      Hardness
      3-3.5 
      Collection
      Don Owens Collection

      Cacoxenite

      #DO46635
      Locality
      Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States 
      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Availability
      Sold
      Size
      4.5 x 4 x 3 cm - Miniature 
      Tagged
      phosphate  

      Golden fibrous crystals less than 1mm filling vugs in limonitic matrix.


      Cacoxenite

      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Crystal System
      Hexagonal 
      Crystal Habit
      Radial, Acicular, Stellate 
      Cleavage
      None, None, None 
      Luster
      Silky 
      Color
      brownish yellow, green, yellow, golden yellow, red yellow 
      Streak
      yellow 
      Class
      Hexagonal - Dihexagonal Dipyramidal 
      Fracture
      Uneven 
      Hardness
      3-3.5 
      Collection
      Don Owens Collection

      Cacoxenite

      #BN53077
      Locality
      Brewer mine, Cedartown, Polk Co., Georgia, United States 
      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Availability
      Sold
      Size
      5.5 x 4 x 2.5 cm - Sm Cabinet 
      Tagged
      phosphate  

      Tiny, less than 1mm, orange sprays of Cacoxenite.


      Cacoxenite

      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Crystal System
      Hexagonal 
      Crystal Habit
      Radial, Acicular, Stellate 
      Cleavage
      None, None, None 
      Luster
      Silky 
      Color
      brownish yellow, green, yellow, golden yellow, red yellow 
      Streak
      yellow 
      Class
      Hexagonal - Dihexagonal Dipyramidal 
      Fracture
      Uneven 
      Hardness
      3-3.5 
      Collection
      Dr. Buford Nichols Collection

      Cacoxenite

      #BN53080
      Locality
      Boar Tusk Mtn., Polk Co., Arkansas, United States 
      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Availability
      Sold
      Size
      4 x 3 x 2.5 cm - Miniature 
      Tagged
      phosphate  

      Fibrous golden crystals of Cacoxenite. Not real rich, but the area where the best crystals are located is 12x8mm.


      Cacoxenite

      Formula
      (Fe3+)24AlO6(PO4)17(OH)12·75H2
      Crystal System
      Hexagonal 
      Crystal Habit
      Radial, Acicular, Stellate 
      Cleavage
      None, None, None 
      Luster
      Silky 
      Color
      brownish yellow, green, yellow, golden yellow, red yellow 
      Streak
      yellow 
      Class
      Hexagonal - Dihexagonal Dipyramidal 
      Fracture
      Uneven 
      Hardness
      3-3.5 
      Collection
      Dr. Buford Nichols Collection

      All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2020 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map

      可以玩现金的麻将平台