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      $450.00 USD
      Prezzo consigliato al pubblico $1,500.00

      29.70cts ALEXANDRITE ROUGH TANZANIA COLOURCHANGE TBM-92

      3191
      7

      SKU
      Dimensioni (mm)
      17.500 x 17.000 x 9.500mm
      Peso (cts)
      29.700
      Treatment
      No Treatment
      Tipo
      Rough
      Colori

      ALEXANDERITE BI-COLOUR TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION NICE GREEN CHANGES TO PURPLE FOR CABBING OR SPECIMEN TREATMENT-NONE This rare gemstone is named after the Russian tsar Alexander II (1818-1881), the very first crystals having been discovered in April 1834 in the emerald mines near the River in the Urals. The discovery was made on the day the future tsar came of age. Although alexandrite is a relatively young gemstone, it certainly has a noble history. Since it shows both red and green, the principal colours of old Imperial Russia, it inevitably became the national stone of tsarist Russia. Alexandrite is very scarce: this is due to its chemical composition. It is basically a chrysoberyl, a mineral consisting of colourless or yellow transparent chrysoberyl, chrysoberyl cat’s eye and colour-changing alexandrite (also in cat’s eye varieties). It differs from other chrysoberyls in that it not only contains iron and titanium, but also chromium as a major impurity. And it is this very element which accounts for the spectacular colour change. Rarely, vanadium may also play a part. According to CIBJO nomenclature, only chrysoberyls displaying a distinct change of colour may be termed alexandrite.

      Fornitore di spedizioni Spedizione a Australia Spedizione nel resto del mondo
      Standard Shipping - Tracked $20.00 / 7 giorni $30.00 / 14 giorni
      Australia
      Standard Shipping - Tracked è scontato a $25.00 sugli ordini con 2 o più articoli
      Resto del mondo
      Standard Shipping - Tracked è scontato a $30.00 sugli ordini con 2 o più articoli
      FedEx $40.00 / 3 giorni $40.00 / 7 giorni
      Australia
      FedEx è scontato a $40.00 sugli ordini con 2 o più articoli
      Resto del mondo
      FedEx è scontato a $40.00 sugli ordini con 2 o più articoli
      DHL $30.00 / 2 giorni $30.00 / 21 giorni
      Resto del mondo
      DHL è scontato a $30.00 sugli ordini con 2 o più articoli

      trueblueminerals
      trueblueminerals
      rare large gemstones and minerals
      Mermaid Beach , Australia
      Verificato
      815 feedback

      • virginiemillefiori
        virginiemillefiori
        Negativo

        unfortunately the colors in person under artificial or natural light look nothing like the ones posted on the listing. The stone appears very dark blue and it is hard to guess it is a parti sapphire.

      • peketrain
        peketrain
        Positivo

        Very pleased with the specimen and transaction

      • scsamler
        scsamler
        Positivo

        This stone made me fall in love with Padparadsha sapphire. Truly wonderful!

      20%
      Codice coupon love
      Valido fino a
      28th Feb 2025

      Verifica

      Il programma Gemstone Sheriff consente ai nostri membri di richiedere un controllo su qualsiasi prodotto, che viene completato da un Gemologist indipendente che valuta l'accuratezza della descrizione e delle immagini dell'articolo.

      Dettagli di spedizione

      Spedizione:
      $30.00 14 giorni tramite Standard Shipping - Tracked
      Spedizioni da:
      Australia

      Opzioni di pagamento

      • stripe

      Panoramica

      Tipo di elenco : Standard
      Codice prodotto : 1529214
      Inizia : 13th February 2025 08:11 am PST
      * Tutti i prezzi sono in USD