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      $24,000.00 USD
      預計建議零售價:rrp

      12000 CTS AUSTRLIAN EMERALD UNTREATED SPECIMEN TBM-2284 trueblueminera

      1040
      2

      存貨單位
      TBM-2284
      尺寸(毫米)
      230.000 x 110.000 x 80.000mm
      重量 (cts)
      12000.000
      Treatment
      No Treatment
      Clarity
      N/A
      類型
      Specimen
      Shape
      Emerald
      顏色

      AUSTRALIAN EMERALD

      Curlew Emerald Mine, Shaw River District, East Pilbara Shire, Western Australia, Australia

      STUNNING SPECIMEN

      TREATMENT -NONE

      COLLECTOR PC

      GREEN-CRYSTAL

      ON HOST ROCK

      Specimens can consist Light green beryl crystals to green beryl coloration, with minor dark biotite specks mica ,schist and purple fluorite inclusions.

      The dark mica schists within the quartz veins and pegmatites contain gem quality emerald crystals and green beryl. As is typical of Western Australian emerald


      Beryl Be3Al2(Si6O18) , Biotite K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 , Quartz SiO2



      Curlew Emerald Mine, Shaw River District, East Pilbara Shire, Western Australia, Australia


      Nearly all production of emerald in Western Australia has been from a deposit at Poona but there are beryl and emerald deposits at Menzies and in the Pilbara region, south of Port Hedland.

      Australian emeralds
      Emeralds have been commercially mined in Australia in three main deposits Poona and Menzies in Western Australia, and Emmaville in New South Wales. The emeralds are usually in rocks among layers of other minerals such as mica. Open pit mining or terrace mining are the most common methods. discovered in Western Australia in 1912 at Poona, 500 km north-east of Perth. The main mine of the district was the Aga Khan which operated on and off for more than 70 years until 1980 and yielded an estimated 10,000 grams of mostly low value emerald. During the1980s another mine in WA was worked some 40kms west of Menzies.
      In Australia, emerald is associated with granite pegmatites and metamorphosed rocks called schists. It is also sometimes associated with altered limestones or can be found embedded in calcite or quartz. A pegmatite forms when a magma cools, leaving some elements behind in the remaining fluid. Emerald crystals may grow when the remaining solution cools as long as the necessary elements are present, including beryllium. Emeralds can also form in veins in the crust from hot liquids that escape from a deeper magma.

      Processing

      Screens are used to sort the emeralds by size and then silt and clays are washed away to expose the emerald-bearing schist. No other chemicals are used in this process. Any schist or other rock still attached to the emerald is removed manually in a process called cobbing. Higher quality materials can be cleaned using high-pressure air.

      Mining

      Emeralds have been commercially mined in Australia in three main deposits Poona and Menzies in Western Australia, and Emmaville in New South Wales. The emeralds are usually in rocks among layers of other minerals such as mica. Open pit mining or terrace mining are the most common methods. Miners dig a pit with shovels, excavators or other earth moving equipment, depending on the scale of the mine. If the emerald-bearing ore is beneath a substantial cover of soil and rock, explosives might be used to remove this material. Sometimes high pressure water is used to blast the rock to reveal mineral bearing rocks. Tunnels are also used to extract emeralds from deeper rock layers.


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      trueblueminerals
      trueblueminerals
      rare large gemstones and minerals
      :城市,國家
      已驗證
      :總反饋

      • virginiemillefiori
        virginiemillefiori
        消極的

        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
        積極的

        Very pleased with the specimen and transaction

      • scsamler
        scsamler
        積極的

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

      20%
      優惠券代碼 love
      有效期至
      28th Feb 2025

      審計

      該產品已由Gemstone Sheriff審核,他們發現以下內容:
      • 描述準確
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      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.

      請求進行此審核:日期
      最後更新:日期

      送貨細節

      船運:
      $30.00 14透過Standard Shipping - Tracked計算天數
      發貨自:
      Australia

      付款方式

      • stripe

      概述

      列表類型 : Standard
      產品編號 : 2288395
      開始 : 20th February 2025 04:47 am PST
      * 所有價格均以:貨幣為單位