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1920s Brooch Onyx Diamonds
1920s Brooch Onyx Diamonds Diamond Brooch with Onyx Antique Brooch with Onyx and Diamond 1920s Brooch Onyx Diamonds 1920s Brooch Diamonds Antique Diamond Brooch Antique 1920s Brooch 1920s Brooch Onyx Diamonds Wearing Image 1920s Brooch Onyx Diamonds Grading 1920s Brooch Onyx Diamonds Certificate 1920s Brooch Onyx Diamonds Certificate

1.85ct Diamond and 0.36ct Onyx, Platinum Brooch - Art Deco - Antique Circa 1925

A stunning, fine and impressive 1.85 carat diamond, 0.36 carat onyx and platinum brooch; part of our diverse antique jewellery and estate jewelry collections

SKU C6861


This stunning, fine and impressive Art Deco brooch has been crafted in platinum.

The iconic Art Deco style navette-shaped frame is ornamented with a feature collet set 0.46ct Old European round cut diamond, emanating from a curvilinear formation embellished with eighteen diamonds in a combination of Old European and eight cuts.

The opposing surface of the frame features an enveloping flourish design ornamented with seven diamonds, in addition to a second collet set diamond emanating into the centre of the design.

The inner corners of the brooch are embellished with ten mixed cut onyx, set in a chevron formation, totalling 0.36ct.

The outer frame of this iconic Art Deco design is ornamented with forty-four pavé set diamonds, graduating in size depending on location.

The brooch secures to the reverse with a hinged double pin and clasp.

This antique 1920s brooch with onyx and diamonds has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

The brooch is supplied with an independent diamond grading certificate, in addition to a diamond grading report card for the supporting stones.

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.

View the complete range of diamond brooch at AC Silver

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

The supporting diamonds display a fine white colour and brilliance.

The impressive onyx displays fine colour

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

Reflections in photographs may detract from the true representation of this fine 1920s brooch with onyx and diamonds.

Cut Mixed

Content 0.36 carat

Feature Diamond One

Colour H

Clarity VS2

Cut Old European

Content 0.46 carat

Dimensions 4.48mm x 4.36mm x 3.27mm

Supporting Diamonds

Colour (average grades) H

Clarity (average grades) P1

Cut Old European/Eight

Content 1.39 carats

Total Diamond Content

1.85 carats

Length of setting 5.4cm/2.13"

Width of setting 1.73cm/0.68"

Across pin 4.7cm/1.85"

Height of setting 5mm/0.2"

7.36 grams

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Proud Members of

International Federation of Art and Antique Dealer Associations CINOA
National Association of Jewellery UK's trade association NAJ