THE PREMIER MARKETPLACE FOR REAL GEMS
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      5bad9a93-93d2-4c3e-a986-469d926ee3c4.jpg
      2b5350a0-870c-41c0-a2dd-872bbeabd1bb.jpg
      $48.00 USD
      Prix

      Zircon, 1.85ct, great colour, excellent shape!

      1089
      0

      UGS
      Cpt8
      Dimensions (mm)
      7.100 x 6.400 x 3.800mm
      Poids (cts)
      1.850
      Treatment
      No Treatment
      Shape
      Oval
      Taper
      Faceted
      Clarity
      VS
      Couleurs

      Zircon ( /ˈzɜːrkɒn/[6][7] or /ˈzɜːrkən/) is a mineral belonging to the group of nesosilicates. Its chemical name is zirconium silicate, and its corresponding chemical formula is ZrSiO4. A common empirical formula showing some of the range of substitution in zircon is (Zr1–y, REEy)(SiO4)1–x(OH)4x–y. Zircon forms in silicate melts with large proportions of high field strength incompatible elements. For example, hafnium is almost always present in quantities ranging from 1 to 4%. The crystal structure of zircon is tetragonal crystal system. The natural colour of zircon varies between colourless, yellow-golden, red, brown, blue and green.

      The name derives from the Persian zargun, meaning "gold-hued". This word is corrupted into "jargoon", a term applied to light-colored zircons. The English word "zircon" is derived from Zirkon, which is the German adaptation of this word. Yellow, orange and red zircon is also known as "hyacinth", from the flower hyacinthus, whose name is of Ancient Greek origin.

      Zircon is common in the crust of Earth. It occurs as a common accessory mineral in igneous rocks (as primary crystallization products), in metamorphic rocks and as detrital grains in sedimentary rocks. Large zircon crystals are rare. Their average size in granite rocks is about 0.1–0.3 mm, but they can also grow to sizes of several centimeters, especially in mafic pegmatites and carbonatites. Zircon is also very resistant to heat and corrosion.

      Because of their uranium and thorium content, some zircons undergo metamictization. Connected to internal radiation damage, these processes partially disrupt the crystal structure and partly explain the highly variable properties of zircon. As zircon becomes more and more modified by internal radiation damage, the density decreases, the crystal structure is compromised, and the color changes.

      Zircon occurs in many colors, including reddish brown, yellow, green, blue, gray and colorless. The color of zircons can sometimes be changed by heat treatment. Common brown zircons can be transformed into colorless and blue zircons by heating to 800 to 1000 °C. In geological settings, the development of pink, red, and purple zircon occurs after hundreds of millions of years, if the crystal has sufficient trace elements to produce color centers. Color in this red or pink series is annealed in geological conditions above temperatures of around 400 °C.

      Zircon has played an important role during the evolution of radiometric dating. Zircons contain trace amounts of uranium and thorium (from 10 ppm up to 1 wt%) and can be dated using several modern analytical techniques. Because zircons can survive geologic processes like erosion, transport, even high-grade metamorphism, they contain a rich and varied record of geological processes. Currently, zircons are typically dated by uranium-lead (U-Pb), fission-track, cathodoluminescence, and U+Th/He techniques. For instance, imaging the cathodoluminescence emission from fast electrons can be used as a prescreening tool for high-resolution secondary-ion-mass spectrometry (SIMS) to image the zonation pattern and identify regions of interest for isotope analysis. This is done using an integrated cathodoluminescence and scanning electron microscope. Zircons in sedimentary rock can identify the sediment source.

      Zircons from Jack Hills in the Narryer Gneiss Terrane, Yilgarn Craton, Western Australia, have yielded U-Pb ages up to 4.404 billion years, interpreted to be the age of crystallization, making them the oldest minerals so far dated on Earth. In addition, the oxygen isotopic compositions of some of these zircons have been interpreted to indicate that more than 4.4 billion years ago there was already water on the surface of the Earth. This interpretation is supported by additional trace element data, but is also the subject of debate. In 2015, "remains of biotic life" were found in 4.1 billion-year-old rocks in the Jack Hills of Western Australia. According to one of the researchers, "If life arose relatively quickly on Earth ... then it could be common in the universe.

      Shipping: For special requests such as express delivery please contact me. For lost stones the seller is not liable, therefore an additional insurance is recommended. Right of return within two weeks after receiving the shipment. Payment via PayPal, Credit Card, or Bank transfer is possible. For the shipping I generally use: Austrian Post or FedEx. Unfortunately from Austria only DHL "express" is possible.

      Please pay your stones in between 48 hours or contact me. Otherwise I need to cancel the deal.

      If there is anything you shouldn't be satisfied with please just let me now and we will find a way to solve every problem. My aim is to make you happy with beautiful stones of good quality, good communication is the easiest way to find a solution!



      Fournisseur d'expédition Expédition vers Austria Expédition dans le reste du monde
      Standard Shipping - Tracked $12.00 / 3 $16.00 / 21
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      Express Shipping $36.00 / 2 $75.00 / 5
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      Registered Shipping $9.00 / 7 $16.00 / 21
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      Standard Shipping - Untracked $5.00 / 3 $13.00 / 28
      Austria
      Standard Shipping - Untracked bénéficie d'une remise de $15.00 sur les commandes contenant 3 ou plus d'articles
      Reste du monde
      Standard Shipping - Untracked bénéficie d'une remise de $13.00 sur les commandes contenant 3 ou plus d'articles

      stonehengejpd
      stonehengejpd
      Selling all kind of gems, great quality at affordable prices, based in the heart of Europe! In case you may have special wishes just let me know :-) If you shouldn´t be satisfied with an order please do not give a negative feedback just let me know and there is always a way to find a solution that everybody is happy!
      Graz , Austria
      Vérifié
      2885

      • golda1
        golda1
        Positif

        Great Seller, AAAAAAAAAAAAAAAAAAA+++++++++++++

      • marisha
        marisha
        Positif

        Beautiful stone! Excellent seller, will buy from here again.

      • graphicequaliser
        graphicequaliser
        Positif

        An exquisite gem and very clean. It arrived promptly too. Thank you.

      Audit

      Le programme Gemstone Sheriff permet à nos membres de demander un audit sur tout produit, qui est complété par un Gemologist indépendant qui évalue l'exactitude de la description de l'article et des photos.

      Les détails d'expédition

      Expédition:
      $16.00 21 les jours via Standard Shipping - Tracked
      Expédié depuis:
      Austria

      Options de paiement

      • paypal
      • stripe
      • escrow
      Ce vendeur ajoute 20.00% aux transactions en Austria .

      Aperçu

      Type d'inscription : Standard
      Identifiant du produit : 2405097
      Départs : 28th January 2025 01:54 pm PST
      * Tous les prix sont en USD