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      $1,500.00 USD
      预计建议零售价:rrp

      0.72 CTS CERTIFIED ALEXANDRITE TANZANIA COLOURCHANGE TBM-793

      1168
      1

      存货单位
      tbm-793
      尺寸(毫米)
      6.220 x 4.930 x 3.320mm
      重量 (cts)
      0.720
      Certified Gemstones
      是的
      Treatment
      No Treatment
      Clarity
      SI
      类型
      Faceted
      颜色

      ALEXANDERITE

      BI-COLOUR

      TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION

      NICE GREEN CHANGES TO PURPLE

      IDEAL FOR CABBING

      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.

      运输商 运送至:国家 运送到世界其他地区
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      :国家
      Standard Shipping - Tracked折扣至$25.00 ,适用于包含2或更多商品的订单
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      FedEx $40.00 / :几天天 $40.00 / :几天天
      :国家
      FedEx折扣至$40.00 ,适用于包含2或更多商品的订单
      世界其他地区
      FedEx折扣至$40.00 ,适用于包含2或更多商品的订单
      DHL $30.00 / :几天天 $30.00 / :几天天
      世界其他地区
      DHL折扣至$30.00 ,适用于包含2或更多商品的订单

      trueblueminerals
      trueblueminerals
      rare large gemstones and minerals
      :城市,国家
      已验证
      :总反馈

      • virginiemillefiori
        virginiemillefiori
        消极的

        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
        积极的

        Very pleased with the specimen and transaction

      • scsamler
        scsamler
        积极的

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

      20%
      优惠券代码 love
      有效期至
      28th Feb 2025

      审计

      该产品已通过Gemstone Sheriff审核,并发现以下问题:
      • 描述准确
      • 图片准确

      Comments

      The Verified Seller responsible for this item has diligently provided us with accurate and comprehensive information, encompassing crucial details such as weight, dimensions, and treatment. It is important to reiterate our commitment to upholding the highest standards of integrity and transparency in the gemstone industry. As part of our policy, we strictly permit the sale of exclusively natural gemstones that have been sourced directly from the Earth. However, in the event that a gemstone has undergone any form of treatment, it is mandatory for the seller to provide full disclosure regarding the treatment process. Furthermore, we would like to emphasize that man-made gemstones, including simulants and imitations, are strictly prohibited on our platform. We prioritize the promotion of authentic, natural gemstones to ensure a genuine and trustworthy marketplace for our valued customers. Should you have any further inquiries or require additional assistance, please do not hesitate to reach out. We are here to assist you and provide a seamless experience on Gem Rock Auctions.

      最后更新:日期

      送货细节

      船运:
      $30.00 14通过Standard Shipping - Tracked计数天数
      发货自:
      Australia

      付款方式

      • stripe

      概述

      列表类型 : Standard
      产品编号 : 2239942
      开始 : 11th February 2025 02:57 pm PST
      * 所有价格均以:货币为单位