11.20ct Black Onyx and 0.91ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1920

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.

This stunning antique brooch is excellent quality, set with impressive black onyx and high colour graded feature diamond displaying a fine white colour, brilliance and presence.

The supporting evenly colour matched diamonds display a fine white colour and brilliance.

The brooch is an excellent gauge of gold and platinum, and is in excellent condition.

Reflections in photographs may detract from the true representation of this impressive example of antique onyx jewellery.

Content 11.20 carats

Dimensions 34.51mm (length) x 13.65mm (width) x 3.37mm (depth)

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

Length of setting 4.8cm/1.89"

Width of setting 1.63cm/0.64"

Across pin 4.1cm/1.61"

Height of setting 4.08mm/0.16"

10.18 grams