THE PREMIER MARKETPLACE FOR REAL GEMS
Video Player is loading.
Current Time 0:00
Duration -:-
Loaded: 0%
Stream Type LIVE
Remaining Time -:-
 
1x
    • Chapters
    • descriptions off, selected
    • captions off, selected
      5d6dffc2cd6bc.jpg
      5d6dffc2cbc78.jpg
      5d6dffc316957.jpg
      $550.00 USD
      Procijenjeni RRP $1,400.00

      46-CTS DUMORTIERITE ROUGH SPECIMEN RARE MINERAL RG-4220 RAREGEMS

      1366
      3

      SKU
      RG-4220
      Dimenzije (mm)
      24.400 x 22.500 x 18.000mm
      Težina (cts)
      46.000
      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 colour from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the colour 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 coloured 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.


      Pružatelj usluge dostave Dostava Australia Dostava u ostatak svijeta
      Standard Shipping - Tracked $19.00 / 7 $30.00 / 14
      Australia
      Standard Shipping - Tracked je snižen na $19.00 na narudžbe s 2 ili više artikala
      Ostatak svijeta
      Standard Shipping - Tracked je snižen na $30.00 na narudžbe s 2 ili više artikala
      FedEx $39.00 / 4 $40.00 / 4
      Australia
      FedEx je snižen na $39.00 na narudžbe s 2 ili više artikala
      Ostatak svijeta
      FedEx je snižen na $40.00 na narudžbe s 2 ili više artikala
      DHL $19.00 / 2 $30.00 / 14
      Ostatak svijeta
      DHL je snižen na $30.00 na narudžbe s 2 ili više artikala

      raregems
      raregems, all rough
      Mermaid Beach , Australia
      Provjereno
      3611 povratne informacije

      • mschristine
        mschristine
        Pozitivan

        I am a super happy customer with these beautiful rare turquoise gems. Accurate description, shipping was fast, just a little delivery issues here in my local city. otherwise very happy customer.

      • rich7419
        rich7419
        Pozitivan

        Just received my Ruby it’s a cute little thing. I believe my sister-in-law will like it took a minute to get here to the states, but I am happy with my purchase would buy from you again

      • philsgems
        philsgems
        Pozitivan

        Great piece of emerald. I have already faceted a 2.5 carat gem from it. Thankyou

      Revizija

      Program Gemstone Sheriff omogućuje našim članovima da zatraže reviziju bilo kojeg proizvoda, koju dovršava neovisna Gemologist koja procjenjuje točnost opisa artikla i slika.

      Detalji dostave

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

      Načini plačanja

      • stripe
      Ovaj prodavač dodaje 0.00% transakcijama u Australia .

      Pregled

      Vrsta unosa : Standard
      Identifikacijski broj proizvoda : 2034110
      Počinje : 31st January 2025 08:47 pm PST
      * Sve cijene su u USD