Antique Art Deco 11.20ct Black Onyx & 0.91ct Diamond, Platinum Brooch c.1920

Stunning, fine and impressive antique 11.20 carat black onyx and 0.91 carat diamond, platinum and 15ct white gold Art Deco brooch; part of our collection of Art Deco brooches. This stunning antique black onyx brooch has been crafted in platinum, with a 15ct white gold fitting. The rectangular shaped, pierced decorated Art Deco style design displays a feature 0.26ct Old European round cut diamond, pavé set to an octagonal frame to the centre of an impressive black onyx panel. The outer geometric, pierced and millegrain decorated border of this impressive Art Deco brooch is embellished with a further twenty-eight eight-cut diamonds. This stunning Art Deco onyx brooch with diamonds brooch secures to the reverse with a 15ct white gold hinged pin and clasp. This stunning 1920's brooch is supplied with an Idgl diamond and gemstone grading report card. This antique brooch has been independently tested using state of the art technology (Niton Xl2 Analyzer) and verified as platinum and 15ct gold. 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 Content 11.20 carats Dimensions 34.51mm (length) x 13.65mm (width) x 3.37mm (depth) Diamond Quality Feature Diamond One Colour H Clarity Vs2 Cut Old European Content 0.26 carat Dimensions 4.06mm (length) x 3.95mm (width) x 2.57mm (depth) Supporting Diamonds Colour (average grades) H Clarity (average grades) Vs2 Cut Eight Content 0.65 carat Total Diamond Content 0.91 carat Number of Diamonds 29