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      Rare Earth Minerals

      Thursday, 27 February 2020 12:00 PM

      Introducing the "Rare Earth Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including bastnasite-(ce), bastnasite-(la), calcioancylite-(ce), churchite-(y), decrespignyite-(y), and diversilite-(ce) and more from places like Mountain Pass mine, San Bernardino Co., California, United States, Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia, Afrikanda Massif, Kola Peninsula, Russia, Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Russia, and Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia.

      Bastnasite-(Ce)

      #PD34285
      Locality
      Mountain Pass mine, San Bernardino Co., California, United States 
      Formula
      CeCO3
      Availability
      Sold
      Size
      5 x 4 x 4.5 cm - Miniature 
      Tagged
      carbonate , REE mineral  

      This was the main ore and source rock for the major REE elements mined at Mountain Pass. The specimen comes with a small vial of Bastnasite ore.


      Bastnasite-(Ce)

      Formula
      CeCO3
      Crystal System
      Hexagonal 
      Crystal Habit
      Prismatic, Massive - Granular 
      Cleavage
      Imperfect, Indistinct, None 
      Luster
      Vitreous - Greasy 
      Color
      yellow, reddish brown 
      Streak
      white 
      Class
      Hexagonal - Ditrigonal Dipyramidal 
      Fracture
      Uneven 
      Hardness
      4-5 
      Collection
      Don Phillips Collection

      Bastnasite-(La)

      #36348
      Locality
      Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia 
      Formula
      LaCO3
      Availability
      Sold
      Size
      4.5 x 3 x 1 cm - Miniature 
      Tagged
      carbonate , REE mineral  

      Thin light blue crusts on shaley matrix with Malachite. Basnasite-La is a rare mineral that occurs in carbonatites at its type locality in the Belaya Zima REE-Nb deposit in Russia. The blue in this bastnasite is due to an impurity of copper.


      Bastnasite-(La)

      Formula
      LaCO3
      Crystal System
      Hexagonal 
      Crystal Habit
      Prismatic, Massive - Granular 
      Cleavage
      Imperfect, Indistinct, None 
      Luster
      Vitreous - Greasy 
      Color
      yellow, reddish brown 
      Streak
      white 
      Class
      Hexagonal - Ditrigonal Dipyramidal 
      Fracture
      Uneven 
      Hardness
      4-5 

      Calcioancylite-(Ce)

      #PD52167
      Locality
      Afrikanda Massif, Kola Peninsula, Russia 
      Formula
      (Ce,Ca,Sr)CO3(OH,H2O) 
      Availability
      Sold
      Size
      3.5 x 2.5 x 2 cm - Miniature 
      Tagged
      carbonate , REE mineral  

      White to colorless crystal plates to 1.3cm. 


      Calcioancylite-(Ce)

      Formula
      (Ce,Ca,Sr)CO3(OH,H2O) 
      Crystal System
      Orthorhombic 
      Crystal Habit
      Pseudo Octohedral 
      Luster
      Vitreous - Greasy 
      Color
      colorless, gray, pale yellow 
      Class
      Orthorhombic - Dipyramidal 
      Hardness
      4-4.5 
      Collection
      Don Phillips Collection

      Churchite-(Y)

      in amazonite - #PD52166
      Locality
      Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Russia 
      Formula
      YPO4·2H2
      Availability
      Sold
      Size
      3 x 2 x 2 cm - Thumbnail 
      Tagged
      phosphate , REE mineral  

      White grains of Churchite-(Y) in green Microcline, variey amazonite.


      Churchite-(Y)

      Formula
      YPO4·2H2
      Crystal System
      Monoclinic 
      Crystal Habit
      Platy, Acicular, Aggregates 
      Cleavage
      Perfect, None, None 
      Luster
      Vitreous - Pearly 
      Color
      colorless, gray, snow white 
      Streak
      white 
      Class
      Monoclinic 
      Fracture
      Conchoidal 
      Hardness
      Collection
      Don Phillips Collection

      Decrespignyite-(Y)

      #23221
      Locality
      Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia 
      Formula
      Y4Cu(CO3)4Cl(OH)5·2H2
      Availability
      Sold
      Size
      3.5 x 1.5 x 0.6 cm - Miniature 
      Tagged
      carbonate , copper , REE mineral  
      Special Info
      Type Locality 

      Superb, rich specimen of Decrespignyite-(Y) with bright royal blue layers. 


      Decrespignyite-(Y)

      Formula
      Y4Cu(CO3)4Cl(OH)5·2H2
      Crystal System
      Monoclinic 
      Crystal Habit
      Efflorescences, Globular 
      Cleavage
      None, None, None 
      Luster
      Vitreous - Pearly 
      Color
      intense royal blue, turquoise blue 
      Streak
      pale blue 
      Class
      Monoclinic 
      Hardness
      Special Info
      Type Locality

      Diversilite-(Ce)

      #44106
      Locality
      Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia 
      Formula
      Na2Ba6Ce2Fe2+Ti3Si12O36(OH)10·nH2
      Availability
      Available
      Price
      $75.00
      Size
      2.5 x 2 x 1.5 cm - Thumbnail 
      Tagged
      REE mineral  
      Special Info
      Type Locality 

      Tan platy crystals to 2mm in one place. Type and only locality. Extremely rare.


      Diversilite-(Ce)

      Formula
      Na2Ba6Ce2Fe2+Ti3Si12O36(OH)10·nH2
      Crystal System
      Trigonal 
      Crystal Habit
      Fan Shaped, Subhedral Crystals, Platy 
      Cleavage
      None, None, None 
      Luster
      Vitreous (Glassy) 
      Color
      yellowish orange 
      Streak
      white 
      Class
      Trigonal - Pyramidal 
      Fracture
      Brittle - Conchoidal 
      Hardness
      Special Info
      Type Locality

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