1.70ct Black Onyx & 2.20ct Diamond, Platinum Cartier Brooch c.1925

Stunning, fine and impressive 1.70 carat black onyx and 2.20 carat diamond Cartier brooch in platinum - boxed; part of our antique Cartier jewellery collections. This stunning original antique brooch has been crafted in platinum. The pierced decorated, navette-shaped Art Deco style design displays an impressive paralleling array of twenty-eight channel set rectangular cut onyxes, totalling 1.70cts. The black onyx formation is flanked with one hundred and twenty-eight pavé set Dutch cut diamonds, completing the design. The brooch secures to the reverse with a hinged pin and safety clasp. This 1920s brooch is hallmarked to the pin with the maker's mark 'Cartier' and has been independently tested using state of the art technology (Niton Xl2 Analyzer) and verified as platinum. This stunning 1920's brooch is supplied with an Idgl diamond and gemstone grading report card. This stunning Cartier black onyx and diamond brooch is fitted to the original hinged leatherette presentation box, with a satin and velvet lined interior, securing with a push fit catch. The interior of the cover bears the retailer's mark 'Wartski, 33 Mostyn Street, Llandudno'. Such original examples are becoming increasingly difficult to locate. Images do not always reflect the true colour and brilliance of gemstones and diamonds. The video however provides a truer representation of the actual colour and showcases each stone. Onyx Quality Cut Rectangular Cut Content 1.70 carats Diamond Quality Colour (average grades) G Clarity (average grades) Si2 Cut Dutch Content 2.20 carats Number of Diamonds 128