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      84bea789-9a31-4b1d-ad6e-a23bcde8ac97.jpg
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      $90.00 USD
      Procijenjeni RRP $260.00

      9.0CTS DUMORTIERITE ROUGH SPECIMEN RARE MINERAL RG-4217 RAREGEMS

      1138
      6

      SKU
      RG-4217
      Dimenzije (mm)
      20.140 x 11.000 x 6.500mm
      Težina (cts)
      9.000
      Treatment
      No Treatment
      Tip
      Specimen
      Boje

      DUMORTIERITE

      NICE PALE  BLUE COLOUR

      FINE CRYSTAL SPECIMEN


      Dumortierite is a fibrous variably coloured aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartzcontaining abundant dumortierite inclusions.

      Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugène Dumortier (1803–1873).[4] It typically occurs in high temperature aluminium rich regional metamorphic rocks, those resulting from contact metamorphism and also in boron rich pegmatites. The most extensive investigation on dumortierite was done on samples from the high grade metamorphic Gfohl unit in Austria by Fuchs et al. (2005).

      It is used in the manufacture of high grade porcelain. It is sometimes mistaken for sodalite and has been used as imitation lapis lazuli.

      Sources of Dumortierite include Austria, Brazil, Canada, France, Italy, Madagascar, Namibia, Nevada, Norway, Peru, Poland, Russia and Sri Lanka.

      TRADING AS TRUEBLUEOPALS / LIGHTNINGOPALS LLC

      Pružatelj usluge dostave Dostava Australia Dostava u ostatak svijeta
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      raregems
      raregems, all rough
      Mermaid Beach , Australia
      Provjereno
      3625 povratne informacije

      • solusinexistentia
        solusinexistentia
        Pozitivan

        Great quality and price! Item arrived on time. Will purchase from seller again.

      • solusinexistentia
        solusinexistentia
        Pozitivan

        Good experience with seller. Items arrived on time and as described for a good price.

      30%
      Kod kupona 30
      Vrijedi do
      1st Mar 2025

      Revizija

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      Detalji dostave

      dostava:
      $30.00 14 days putem Standard Shipping - Tracked
      Brodovi iz:
      Australia

      Načini plačanja

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      Pregled

      Vrsta unosa : Standard
      Identifikacijski broj proizvoda : 2034119
      Počinje : 14th February 2025 08:52 pm PST
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