Antique Art Deco 3 Carat Diamond Openwork Plaque Brooch in Platinum and 18K Gold

Antique Art Deco 3 Carat Diamond Openwork Plaque Brooch in Platinum & 18K Gold

An Art Deco diamond plaque brooch with a symmetrical openwork design, centred on a round old European cut diamond of approximately 0.60 carat in an octagonal setting. Short rows of baguette-cut diamonds flank the centre, leading to two round diamonds framed in square settings. Smaller round diamonds trace the stepped borders and curved motifs, emphasising the contrast between the geometric framework and the pierced sections.

Crafted in platinum and 18K gold, the brooch fastens with a hinged pin and catch.

Details

* Period — Art Deco, circa 1930
* Metals — Platinum and 18K gold 
* Diamonds — Round and baguette old cuts, estimated 3.00 carats total, including the approximately 0.60-carat centre diamond
* Diamond colour and clarity — Estimated H–J colour and VS–VVS clarity, assessed in the settings
* Dimensions — 5.0 cm × 2.6 cm
* Gross weight — 16.1 g
* Condition — Excellent vintage condition. The diamonds showed no visible signs of abrasion under a jeweller’s loupe.

Condition & Authenticity

Each piece has been carefully inspected and is presented in very good condition, with wear consistent with its age and use. Materials and stones are assessed using standard industry methods and professional experience. Additional images or video are available on request.

Pricing & taxes

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International orders
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