Antique Art Deco 11.20Ct Black Onyx and 0.91Ct Diamond, Platinum Brooch

A stunning, fine and impressive antique Art Deco 7.50 carat onyx, 3.20 carat diamond and platinum brooch; part of our diverse onyx jewelry collections. This stunning antique black onyx brooch has been crafted in platinum. The navette shaped, pierced decorated Art Deco style design displays a feature marquise shaped cabochon onyx, claw set to the centre. This central gemstone is flanked on either side with two horizontal pales ornamented with seventy-two pavé set eight cut diamonds, terminating with horizontal claw set pear shaped cabochon cut onyxes. The outer geometric frame of this impressive 1920s brooch is embellished with a further twenty-eight eight-cut diamonds. This stunning Art Deco onyx brooch...

A stunning, fine and impressive, vintage Art Deco 2.20 carat onyx and 0.50 carat diamond, platinum ring; part of our diverse collection of onyx jewelry. This stunning, fine and impressive vintage onyx and diamond ring has been crafted in platinum. The oval shaped frame is ornamented with three millegrain decorated collet set baguette cut black onyx, totalling 2.20ct, set vertically in a central stepped formation. The central Art Deco design is encompassed with twenty-four pavé set eight cut diamonds, totalling 0.50ct. The twist style ring shoulders integrate with the diamond border and meld seamlessly with the plain hallmarked ring shank. This desirable vintage onyx and diamond ring is hallmarked to the interior of the shank with the maker's mark (Oscar Caplan) and a platinum mark; the ring has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum. This impressive cocktail ring is supplied with an IDGL diamond and gemstone grading report card. This vintage onyx ring...

A stunning, fine and impressive antique 3.22 carat diamond and platinum bar brooch; part of our antique jewelry and estate jewelry collections. This stunning, fine and impressive 1920s diamond brooch...

A stunning, fine and impressive antique 3.50 carat diamond and platinum Art Deco brooch; part of our diverse jewellery and estate jewelry collections. This stunning, fine and impres...

Finely crafted in platinum with Old Mine cut Diamonds weighing a total of approximately 7.50 carats and Onyx. Circa 1930s 7/8 x 2 5/8 inches

This sublime Art Deco brooch is new to our collection. Beautifully set with a stunning selection of Rose Cut, Eight Cut and Old European Cut diamonds totalling an estimated five car...

A striking example of antique craftsmanship, this platinum brooch features an onyx centre, beautifully contrasted by sparkling natural diamonds. The combination of deep black and bri...

A superb Art Deco platinum, diamond, and onyx brooch, notably worn by Yvonne Orji to the 2025 Met Gala after-party. This captivating piece showcases a central rose-cut diamond of 1.3...