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Art Deco Platinum 5.44 Carat Diamond Brooch

A stunning antique Art Deco French 5.44 carat diamond and platinum brooch; part of our diverse antique jewellery and estate jewelry collections

This stunning antique diamond brooch has been expertly crafted from platinum, beautifully reflecting the bold geometric style that defines the Art Deco era.

To the centre lies a breath-taking 1.60ct Old European cut diamond, set in a way that maximizes its brilliance. Surrounding this centrepiece are elegantly arched, pierced designs adorned with bifurcating motifs, which together create a lovely sense of symmetry and balance.

The brooch features stunning collar motifs at both the top and bottom edges, each adorned with pavé set diamonds. Additionally, there are fifty-six Old European cut stones beautifully set throughout the frame, creating an impressive display.

To keep it secure, the brooch has a hinged pin and a safety catch on the back. And just to confirm its authenticity and quality, the side of the frame is marked with the French hallmark for platinum, which is represented by a dog’s head.

This brooch comes with an IDGL diamond grading certificate for the main stone, along with an independent grading report for the accompanying diamonds, ensuring you have complete confidence in the quality of these gemstones.

This antique brooch is a prime example of Art Deco craftsmanship, showcasing a bold design and a rare, high-grade center diamond. Pieces of this caliber are becoming harder to come by, making it a remarkable addition to any fine jewellery collection.

A diamond brooch from the Art Deco era is an unforgettable gift for major life events; whether it’s a big wedding anniversary, a milestone birthday, or retirement . Its bold geometric design paired with an impressive 1.60ct feature diamond makes it a perfect choice for wedding jewellery, perfect for the bride, the mother of the bride, or even as a beloved heirloom to be passed down through generations.

This stunning antique brooch is exceptional quality, set with a very high colour and clarity graded feature diamond displaying a fine white colour, brilliance and presence.

The well colour matched, high colour graded supporting stones display a fine white colour and brilliance.

The brooch is an exceptional gauge of platinum and is in exceptional condition, with a clear French hallmark to the setting.

Additional information

Diamond Quality

Feature Diamond
Colour H
Clarity VVS1
Cut Old European
Content 1.60 carats
Dimensions 7.80mm (length) x 7.75mm (width) x 3.95mm (depth)

Supporting Diamonds
Colour (average grades) G/H
Clarity (average grades) VS1/SI2/P1
Cut Old European
Content 3.84 carats

Total Diamond Content
5.44 carats

Number of Diamonds
62

Dimensions

Length of setting 5.2cm/2.05"
Width of setting 2.4cm/0.94"
Across pin 4.15cm/1.63"
Height of setting 5.39mm/0.21"

Weight

12.7 grams

Date

Circa 1925

Gemstone

Origin

France

Diamond Clarity:

VVS1

Diamond Colour:

H

Can be Resized:

no

FREE INTERNATIONAL SHIPPING
Dispatched via DHL (or equivalent) on the next working day.

Estimated Delivery:

  • UK: 2–3 working days
  • Worldwide: 5–7 working days

Fully Insured in Transit
Free insurance up to £30,000. AC Silver remains responsible until delivery is confirmed.

Returns & Cancellations
You have 14 days to cancel your order.

Returns must be sent to our UK address within 14 days of cancellation.

Customers are responsible for return postage. A refund will be processed after inspection of the returned item.

Altered or Personalised Items

  • Items resized or altered before dispatch: exchange or credit note only
  • Engraved silver: non-refundable

Full returns & cancellation policy

What our customers say

5.0 ★★★★★ ★★★★★ based on 201 reviews
★★★★★ ★★★★★

Lovely selection & excellent service

AC Silver has a stunning selection of antique and vintage items. Both of my brooches arrived right on time as indicated by the tracking. They are even lovelier in person and I look forward to wearing them for decades to come. Andrew and Gemma provided excellent communication and prompt dispatch. I would absolutely recommend working through them.
Christina 15 Jul 2026
★★★★★ ★★★★★

Fabulous service, beautiful product.

Fabulous service, beautiful product.
Imogen 24 Jun 2026
★★★★★ ★★★★★

Beautiful collection and outstanding service

Beautiful collection and outstanding service. I already bought two extraordinary pieces and can only highly recommend.
Christine 23 Jun 2026
★★★★★ ★★★★★

Excellent customer care.

I had to place the order over the phone as my internet was misbehaving. The lady who I spoke to could not have been more helpful and was particularly careful to get all the details correct. I was then informed about the collection and dispatch of the item purchased, by email. The item arrived as expected and it had been most well packed so that no harm could come to it. It was a delight to purchase this item from C6323, AC Silver, and I could not fault any aspect of their customer care. I was highly delighted with my silver mustard pot and it was much better than the pictures on the web site.
Hilary 20 May 2026
★★★★★ ★★★★★

Exceptional personal service

First class personal service and attention to detail along with an exceptional quality of items offered for sale. A very smooth purchasing experience with swift and safe despatch of high value objects via courier. Highly recommended.
Colin 28 Apr 2026
★★★★★ ★★★★★

A lovely experience

AC Silver's website is very detailed and informative - allows customers to make well good comparisons and subsequent choices. The owner and his staff are very helpful and friendly - dealing with them is a pleasure. They go the extra mile to make sure that customers are totally satisfied with their purchases. Would highly recommend this store.
Wendy 27 Feb 2026
★★★★★ ★★★★★

Excellent experience

Excellent experience buying a beautiful item from AC Silver. Enquiries were dealt with quickly and courteously, I felt very confident buying an expensive item online. It arrived quickly and safely, beautifully packaged. I am delighted with it and wouldn't hesitate to recommend AC Silver.
Susan 24 Jan 2026
★★★★★ ★★★★★

This was an all-around great experience. The pre-sale communication was excellent and informative. The team was extremely responsive. When the item arrived, it was exactly as described.

This was an all-around great experience. The pre-sale communication was excellent and informative. The team was extremely responsive. When the item arrived, it was exactly as described. I would recommend these guys to anyone.
26 Dec 2025

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