Antique, Art Deco, 18ct Rose Gold, French, Natural Colour-Change Sapphire and Diamond Cluster Ring

    Description

    Colour-change sapphire and diamond ring, 20th century. This unheated Sri Lankan sapphire appears a subtle cornflower blue in daylight, and a soft violet in incandescent light. The reason for this unusual phenomenon is the presence of Chromium in the stone, which gives the stone its violet hue, and interacts with different colours of light to change the shade of the stone. The presence of Chromium also means that, unusually for a blue sapphire, it also fluoresces red. Under  The design is a classic cluster with touches of Edwardian inspiration, particularly in the millegrained settings of the diamonds, making it a beautiful and timeless choice for an engagement ring.

     

     

    Place Of Origin
    France

     

    Stone Type
    Sapphire: approx. 3.4 carats
    Diamonds: approx. 0.60 carats total
    Accompanied by GCS report no. 79227-83, stating that the sapphire is of Sri Lankan origin, with no indications of heat treatment.

     

    Stone Dimensions
    Sapphire approximately 8.5 x 7.5 x 5.4mm

     

    Height of setting:
    7.5mm

     

    Width of setting at front:
    17.2 x 15.5mm

     

    Metal Type
    18 carat yellow gold

     

    Marks
    French import assay mark for 18 carat gold

     

    Date Of Manufacture
    20th century

     

    Period Of Manufacture

     

    Condition
    Very good

     

    Signs Of Wear
    Very minor wear commensurate with age

    Antique, Art Deco, 18ct Rose Gold, French, Natural Colour-Change Sapphire and Diamond Cluster Ring

      Product form

      SKU: ARB-221

      £6,500

      • ✔ Certificate of Authenticity
      • ✔ Document for Insurance Purposes
      • 350+ rings sold, trading since 2019
      • We hold viewing appointments at Pavilion, 64 Knightsbridge, London SW1X 7JF.

      • WhatsApp Sam on : 07426732855

      Description

      Colour-change sapphire and diamond ring, 20th century. This unheated Sri Lankan sapphire appears a subtle cornflower blue in daylight, and a soft violet in incandescent light. The reason for this unusual phenomenon is the presence of Chromium in the stone, which gives the stone its violet hue, and interacts with different colours of light to change the shade of the stone. The presence of Chromium also means that, unusually for a blue sapphire, it also fluoresces red. Under  The design is a classic cluster with touches of Edwardian inspiration, particularly in the millegrained settings of the diamonds, making it a beautiful and timeless choice for an engagement ring.

       

       

      Place Of Origin
      France

       

      Stone Type
      Sapphire: approx. 3.4 carats
      Diamonds: approx. 0.60 carats total
      Accompanied by GCS report no. 79227-83, stating that the sapphire is of Sri Lankan origin, with no indications of heat treatment.

       

      Stone Dimensions
      Sapphire approximately 8.5 x 7.5 x 5.4mm

       

      Height of setting:
      7.5mm

       

      Width of setting at front:
      17.2 x 15.5mm

       

      Metal Type
      18 carat yellow gold

       

      Marks
      French import assay mark for 18 carat gold

       

      Date Of Manufacture
      20th century

       

      Period Of Manufacture

       

      Condition
      Very good

       

      Signs Of Wear
      Very minor wear commensurate with age

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