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  • An exceptional antique cluster ring c.1920-1930. Modelled in platinum the outer shank is stamped with a dogs head, the French hallmark given to verify the purity of the metal.


    The centre of the ring is set with a large oval sapphire, faceted in a typical old cut oval shape. The deep teal coloured stone has been independently verified as a no-heat stone, likely originating from Australia, Thailand or East Africa. With over 90% of all sapphires being subjected to heat treatment this is a truly rare gemstone.


    The sapphire is estimated between 3.30ct – 3.50ct and measures an impressive 11-12mm in length for maximum finger coverage. Surrounding the centre stone is a halo of glittering transitional cut diamonds, typical of the 1900s. The diamonds are of equal quality to the centre diamond with bright white colour and minimal internal inclusions. Totalling an estimated 0.64ct in weight the diamonds add a beautiful scalloped boarder to this timeless ring.


    Offered in excellent antique condition overall the only wear to note is some very light surface wear to the sapphire and evidence of a historical resize to the rear of the shank.

    No-Heat 3.50ct Sapphire and Diamond Ring

    • Stones: Sapphire and diamond

      Sapphire Carat: 3.30ct – 3.50ct approx. (11.5 x 8.5 x 4.2mm)

      Sapphire Treatment: No treatment, unheated

      Diamond Cut: Transitional/old cut

      Diamond Carat: 0.64ct approx. (2.2mm each)

      Diamond Colour: G-I

      Diamond Clarity: VS-SI1

      Dimensions of Head: 18.5mm x 16.5mm

      Metal: Platinum, French hallmarks

      Weight: 5.1g

      Ring Size: J (US 4 5/8)

    • Please add the size you require as a note at checkout. 

      We offer a ring re-sizing service by our antique specialist for a small fee, starting at £40.

      Most of our rings can be resized, but if they can’t we will stipulate this in the description.

      As a rule we will only alter a ring by three UK sizes. If you would like to size a ring more than three UK sizes (either up or down) please contact us on a case by case basis and we will try and accommodate you as best as possible.

      We do not offer refunds on altered pieces, so please make sure you love your new piece before you purchase. 

      Sizing takes approximately 1-2 weeks.

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