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      Mixed Systematic Minerals

      Sunday, 17 May 2020 08:00 PM

      Introducing the "Mixed Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including barnesite, beryl, cobaltarthurite, galena, groutite, and noonkanbahite and more from places like Cactus Rat mine, Grand Co., Utah, United States, Topaz Mountain, Thomas Range, Juab Co., Utah, United States, Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain, Felsobanya, Baia Mare, Maramures Co., Romania, Chinle Fm, Navajo Co., Arizona, United States, and Graulay, Hillescheim, Eifel Mountains, Rheinland-Pfalz, Germany.

      Barnesite

      #AH53245
      Locality
      Cactus Rat mine, Grand Co., Utah, United States 
      Formula
      Na2V5+6O16·3H2
      Availability
      Sold
      Size
      8 x 7 x 3 cm - Sm Cabinet 
      Tagged
      vanadium  

      Minute rusty red crystals. 


      Barnesite

      Formula
      Na2V5+6O16·3H2
      Crystal System
      Monoclinic 
      Luster
      Adamantine 
      Color
      brown red, dark red 
      Streak
      brownish red 
      Class
      Monoclinic - Prismatic 
      Hardness
      Collection
      Arnold G Hampson Collection
      Mineralpedia
      View Barnesite
      On Dakota Matrix
      Previously Sold Barnesite
      On Dakota Matrix
      Other Available Barnesite
      WebMineral
      View Barnesite
      Mindat
      View Barnesite

      Beryl

      #AH53305
      Locality
      Topaz Mountain, Thomas Range, Juab Co., Utah, United States 
      Formula
      Be3Al2Si6O18 
      Availability
      Available
      Price
      $70.00
      Size
      4.5 x 4.5 x 3 cm - Miniature 
      Tagged
      beryllium  

      One small pink crystal of rare red Beryl in rhyolite tuff to 2mm.


      Beryl

      Formula
      Be3Al2Si6O18 
      Crystal System
      Hexagonal 
      Crystal Habit
      Crystalline - Coarse, Prismatic, Columnar 
      Cleavage
      Imperfect, None, None 
      Luster
      Vitreous - Resinous 
      Color
      green, blue, yellow, colorless, pink 
      Streak
      white 
      Class
      Hexagonal - Dihexagonal Dipyramidal 
      Fracture
      Brittle - Conchoidal 
      Hardness
      7.5-8 
      Collection
      Arnold G Hampson Collection
      Mineralpedia
      View Beryl
      On Dakota Matrix
      Previously Sold Beryl
      On Dakota Matrix
      Other Available Beryl
      WebMineral
      View Beryl
      Mindat
      View Beryl

      Cobaltarthurite

      with Conichalcite - #PD31072
      Locality
      Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain 
      Formula
      CoFe+32(AsO4)2(OH)2·4H2
      Availability
      Sold
      Size
      2 x 2 x 1.5 cm - Thumbnail 
      Tagged
      arsenate  

      Light green, rare, Cobaltarthurite with darker green beads of Conichalcite.


      Cobaltarthurite

      Formula
      CoFe+32(AsO4)2(OH)2·4H2
      Crystal System
      Monoclinic 
      Crystal Habit
      Globular, Oolitic, Massive 
      Cleavage
      None, None, None 
      Luster
      Vitreous - Silky 
      Color
      straw yellow, dark brown 
      Streak
      light brownish white 
      Class
      Monoclinic - Prismatic 
      Fracture
      Brittle 
      Hardness
      3.5-4 

      Galena

      with Sphalerite & Pyrite after Pyrrhotite - #53301
      Locality
      Felsobanya, Baia Mare, Maramures Co., Romania 
      Formula
      PbS 
      Availability
      Available
      Price
      $45.00
      Size
      6 x 3.5 x 3 cm - Sm Cabinet 
      Tagged
      sulfide  

      This is a good study specimen with a lot going on. The Pyrite pseudo after the Pyrrhotite is the cool thing. You can see that perched at the top and the dimension is 9mm across. The only other place I have seen this is here in the Black Hills at the Double Rainbow mine. One shot you can see the hexagonal outline of the former Pyrrhotite. Also the Galena maybe a spinel twin and has alot of jet black, lustorus Sphalerite crystals all over it. 


      Galena

      Formula
      PbS 
      Crystal System
      Isometric 
      Crystal Habit
      Euhedral Crystals, Massive - Granular, Massive 
      Cleavage
      Perfect, Perfect, Perfect 
      Luster
      Metallic 
      Color
      light lead gray, dark lead gray 
      Streak
      grayish black 
      Class
      Isometric - Hexoctahedral 
      Fracture
      Brittle 
      Hardness
      2.5 
      Mineralpedia
      View Galena
      On Dakota Matrix
      Previously Sold Galena
      On Dakota Matrix
      Other Available Galena
      WebMineral
      View Galena
      Mindat
      View Galena

      Groutite

      on petrified wood - #AH53269
      Locality
      Chinle Fm, Navajo Co., Arizona, United States 
      Formula
      Mn3+O(OH) 
      Availability
      Available
      Price
      $45.00
      Size
      2 x 2 x 2 cm - Thumbnail 

      Shiny, slender needles of black Groutite to 4mm on petrified wood.


      Groutite

      Formula
      Mn3+O(OH) 
      Crystal System
      Orthorhombic 
      Crystal Habit
      Acicular, Striated, Prismatic 
      Cleavage
      Perfect, Distinct, None 
      Luster
      Adamantine - Metallic 
      Color
      blue black 
      Streak
      dark brown 
      Class
      Orthorhombic - Dipyramidal 
      Fracture
      Brittle - Uneven 
      Hardness
      5.5 
      Collection
      Arnold G Hampson Collection
      Mineralpedia
      View Groutite
      On Dakota Matrix
      Previously Sold Groutite
      On Dakota Matrix
      Other Available Groutite
      WebMineral
      View Groutite
      Mindat
      View Groutite

      Noonkanbahite

      #52361
      Locality
      Graulay, Hillescheim, Eifel Mountains, Rheinland-Pfalz, Germany 
      Formula
      KNaBaTi2(Si4O12)O2 
      Availability
      Available
      Price
      $40.00
      Size
      2 x 1 x 1 cm - Thumbnail 

      Orange-brown little, less than 1mm, prismatic crystals less than 1mm. One group has several stacked sub-parallel crystals.


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