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  • A lovely early 1900s diamond and sapphire trilogy ring. The centre of the ring holds a chunky old mined cut diamond, estimated at approximately half a carat in weight. The diamond is beautiful quality with an almost fancy light yellow body colour and high clarity grade, its fiery hand cut facets in excellent condition. Hand cut in the late 1800s the diamond is slightly oval in shape, meaning that its set with a very small gap either side where the mount lends itself to a more round stone; securely set, this just adds to the character of this antique piece.


    Either side of the diamond are two lovely onyx stones. The onyx have been cut in desirable French mixed cuts with a lovely square outline that lends itself to the art deco period. The onyx are in excellent overall condition.


    The ring is modelled in yellow gold, with the gemstone collets topped with white gold. The white gold has tarnished with time and could use a professional polish, if you would like this please leave us a note at checkout and we can happily arrange this free of charge.

    0.50ct Diamond and Onyx Square Trilogy Ring

    • Stones: Onyx and diamond

      Diamond Cut: Old mined cut

      Diamond Carat: 0.50ct approx. (4.5mm x 4.2mm x 3.5mm)

      Diamond Colour: O -P

      Diamond Clarity: VS

      Onyx Cut: Mixed French cut

      Onyx Measurements: 5mm

      Metal: 15ct gold, tested

      Weight: 2.1g

      Ring Size: N (US 6.5)

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

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