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      $80.00 USD
      Prezzo

      107.23 CTS RUBY ROUGH PARCEL FROM MADAGASCAR -TREATED [F8365]

      1726
      3

      SKU
      Dimensioni (mm)
      15.000 x 13.500 x 5.000mm
      Peso (cts)
      107.230
      Tipo
      Rough
      Colori

       

       

      RUBY ROUGH PARCEL

       

       

      Birthstone for July

       

      This is rough parcel Ruby from Madagascar which has been treated and  showing stunning colors.

        We have placed the rough parcel under a torch so you can see how transparent the rough are.

      Rough parcel mined in Madagascar-africa. The material has been heated to improve its colour and it has also been treated by lead glass filling.

       The weight is for the parcel and the size is for the largest piece.



       

       

      A Ruby is a pink to blood-red gemstone  a variety of the mineral corundum (aluminium oxide]. The common red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires. Prices of rubies are primarily determined by color. The brightest and best "red" called pigeon blood-red, commands a huge premium over other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions will indicate that the stone has been treated one way or another. Cut and carat (size) also determine the price

       

      TREATMENTS

       

      The most common treatment is the application of heat. Most if not all rubies at the lower end of the market are heat treated on the rough stones to improve color, remove purple tinge, blue patches and silk. These heat treatments typically occur around temperatures of 1800°C (3300°F).Some rubies undergo a process of low tube heat, when the stone is heated over charcoal of a temperature of about 1300°C (2400°F) for 20 to 30 minutes. The silk is only partially broken as the color is improved.

      LEAD GLASS TREATMENT

      Filling the fractures inside the ruby with lead glass dramatically improves the transparency of the stone, making previously unsuitable rubies fit for applications in jewelry. The process is done in four steps:

      1. The rough stones are pre-polished to eradicate all surface impurities that may affect the process
      2. The rough is cleaned with hydrogen fluoride
      3. The first heating process during which no fillers are added. The heating process eradicates impurities inside the fractures. Although this can be done at temperatures up to 1400°C (2500°F) it most likely occurs at a temperature of around 900°C (1600°F) since the rutile silk is still intact
      4. The second heating process in an electrical oven with different chemical additives. Different solutions and mixes have shown to be successful, however mostly lead-containing glass-powder is used at present. The ruby is dipped into oils, then covered with powder, embedded on a tile and placed in the oven where it is heated at around 900°C (1600°F) for one hour in an oxidizing atmosphere. The orange colored powder transforms upon heating into a transparent to yellow-colored paste, which fills all fractures. After cooling the color of the paste is fully transparent, that dramatically improves the overall transparency of the ruby.

       


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      sedagems
      Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.
      Mermaid Waters , Australia
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      • rickferreira626
        rickferreira626
        Positivo

        A gorgeous pair blue topaz stones. This is one happy customer.

      • opalgoat
        opalgoat
        Positivo

        Well packaged, beautiful gems

      • opalgoat
        opalgoat
        Positivo

        Well packaged, beautiful gems

      • opalgoat
        opalgoat
        Positivo

        Well packaged, beautiful gems

      • opalgoat
        opalgoat
        Positivo

        Well packaged, beautiful gems

      Verifica

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      Dettagli di spedizione

      Spedizione:
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      Spedizioni da:
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      Panoramica

      Tipo di elenco : Standard
      Codice prodotto : 1067153
      Inizia : 28th February 2025 06:04 pm PST
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