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Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930
Sold by AC Silver
sold SA1163125
Sorry, but this item has been sold.
AC Silver

AC Silver

Sellingantiques Verified Since Apr 2009
Browse dealers 472 items
  • About Us
    Welcome to ac silver antique silver and antique jewellery specialists since 1977
  • Trade Associations
    AC Silver is a registered member of LAPADA  CINOA
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Id #SA1163125
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Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

1920 - 1940
Sold by AC Silver
Sold 18 June 2026 · AC Silver
This “Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930” found a buyer.

It was listed by AC Silver. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.

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1930s Diamond Brooch1930s Diamond JewelleryArt Deco Diamond Pin Ask the dealer for something similar
Description

A stunning, fine and impressive antique Art Deco 4.28 carat diamond and platinum brooch; part of our diverse antique jewellery and estate jewelry collections.

This stunning, fine and impressive antique diamond brooch has been crafted in platinum.

The pierced decorated, geometric Art Deco rectangular-shaped frame is ornamented with a convex collar design to the upper and lower portions, each ornamented with a vertical array of three channel set baguette cut diamonds flanked with a tiered arrangement of eighteen pavé set diamonds in a combination of Old European and eight-cuts.

The geometric frame of this iconic Art Deco brooch is embellished with twenty pavé set diamonds.

The symmetrical motifs to either side of the brooch are embellished with eighteen further pavé set diamonds, completing the design.

The stunning brooch has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

This antique Art Deco brooch is supplied with an IDGL diamond grading report card.

This stunning and iconic Art Deco brooch is the finest of its type you could hope to acquire.

This antique 4.28ct diamond brooch from the Art Deco era embodies bold geometry, antique glamour and masterful craftsmanship. The piece is a magnificent choice for milestone occasions, in addition to discerning collectors and lovers of antique design.

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 in diamond brooches.

Condition

This stunning antique Art Deco diamond brooch is exceptional quality, set with high colour graded diamonds displaying a fine white colour and brilliance.

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

Reflections in photographs may detract from the true representation of this fine example of Art Deco jewellery/estate jewelry.

Diamond Quality

Colour (average grades) G/H/I

Clarity (average grades) VS2/SI2

Cut Baguette/Old European/Eight

Content 4.28 carats

Number of Diamonds

98

Dimensions

Length of setting 4.4cm/1.73'

Width of setting 2.38cm/0.94'

Across pin 3.1cm/1.22'

Height of setting 5.4mm/0.21'

Weight

12.56 grams

Date: Circa 1930

A video is available upon request.

Date of Manufacture

AC Silver has dated this Art Deco Diamond Brooch to the 1930s.

Physical Dimensions
Height
0.5cm (0.20")
Width
2.4cm (0.94")
Depth
4.4cm (1.73")
Reference Numbers
Sellingantiques Reference
SA1163125
Dealers Internal Reference
C9414
Dealers Notes

PLEASE NOTE: AC Silver takes pride in offering only quality items for sale.

This pride in quality includes the professional, efficient and personal service extended to all AC Silver customers.

All items purchased usually dispatched within 24 hours following cleared payment.

All items are professionally and securely packaged, sent FREE of charge and are FULLY INSURED during transit.

FREE worldwide international deliveries are via FedEx International Priority Service.

AC Silver is pleased to provide a 30-day money back guarantee.

Description
A stunning, fine and impressive antique Art Deco 4.
“
28 carat diamond and platinum brooch; part of our diverse antique jewellery and estate jewelry collections.
AC Silver

This stunning, fine and impressive antique diamond brooch has been crafted in platinum.

fig 1. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 1. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

The pierced decorated, geometric Art Deco rectangular-shaped frame is ornamented with a convex collar design to the upper and lower portions, each ornamented with a vertical array of three channel set baguette cut diamonds flanked with a tiered arrangement of eighteen pavé set diamonds in a combination of Old European and eight-cuts.

fig 2. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 2. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

The geometric frame of this iconic Art Deco brooch is embellished with twenty pavé set diamonds.

The symmetrical motifs to either side of the brooch are embellished with eighteen further pavé set diamonds, completing the design.

fig 3. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 3. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

The stunning brooch has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

This antique Art Deco brooch is supplied with an IDGL diamond grading report card.

fig 4. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 4. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

This stunning and iconic Art Deco brooch is the finest of its type you could hope to acquire.

This antique 4.28ct diamond brooch from the Art Deco era embodies bold geometry, antique glamour and masterful craftsmanship. The piece is a magnificent choice for milestone occasions, in addition to discerning collectors and lovers of antique design.

fig 5. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 5. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

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 in diamond brooches.

fig 6. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 6. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

Condition

This stunning antique Art Deco diamond brooch is exceptional quality, set with high colour graded diamonds displaying a fine white colour and brilliance.

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

fig 7. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 7. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

Reflections in photographs may detract from the true representation of this fine example of Art Deco jewellery/estate jewelry.

Diamond Quality

Colour (average grades) G/H/I

Clarity (average grades) VS2/SI2

fig 8. An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
fig 8. Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

Cut Baguette/Old European/Eight

Content 4.28 carats

Number of Diamonds

98

Dimensions

Length of setting 4.4cm/1.73'

Width of setting 2.38cm/0.94'

Across pin 3.1cm/1.22'

Height of setting 5.4mm/0.21'

Weight

12.56 grams

Date: Circa 1930

A video is available upon request.

Date of Manufacture

AC Silver has dated this Art Deco Diamond Brooch to the 1930s.

Height
0.5cm (0.20")
Width
2.4cm (0.94")
Depth
4.4cm (1.73")
Reference Numbers
Sellingantiques Ref
SA1163125
Dealers Internal Ref
C9414
AC Silver
AC Silver
Sellingantiques verified Since Apr 2009

Welcome to ac silver antique silver and antique jewellery specialists since 1977

Dealer Profile

You can view the stock and full dealer information on the AC Silver Profile Page

Trade Associations

AC Silver is a registered member of LAPADA  CINOA

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SAVE
An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. SOLD18 JUN 26
1 / 11
Archive I An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. SOLD18 JUN 26

Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930

Archive II An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View II
Archive III An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View III
Archive IV An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View IV
Archive V An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View V
Archive VI An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View VI
Archive VII An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View VII
Archive VIII An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View VIII
Archive IX An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View IX
Archive X An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View X
Archive XI An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds. View XI
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AC Silver

AC Silver
Telephone 0191 240 2645
Location
35B St Georges Terrace
Jesmond
Newcastle Upon Tyne
Tyne and Wear
NE2 2SU
United Kingdom
Dealer Profile Page sellingantiques.co.uk/ac
Verified Since Apr 2009
Items For Sale 472
Items Sold 116
AC Silver
AC Silver
Verified Since Apr 2009
View Dealer Info
Location: 35B St Georges Terrace, Jesmond, Newcastle Upon Tyne, Tyne and Wear, NE2 2SU, United Kingdom
Profile: sellingantiques.co.uk/ac
Verified
Apr 2009
For Sale
472
Sold
116
An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
Antique Art Deco 4.28ct Diamond and Platinum Brooch Circa 1930
Ref: SA1163125
An intricate geometric Art Deco platinum brooch set with numerous round and baguette-cut diamonds.
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Cataloguer’s note

Written by Sellingantiques from the dealer’s photographs and listing
  • ObjectBrooches
  • Period1920 - 1940
  • StyleArt Deco
  • MaterialPlatinum, Diamond
  • ColourSilver
  • MotifsGeometric symmetry, Millegrain detailing, Open-work platinum filigree, Baguette and round diamond settings
  • SizeH 0.5 cm (0 in) x W 2.4 cm (1 in) x D 4.4 cm (2 in)

FAQs

Art Deco jewellery, prominent during the 1920s and 1930s, is characterised by geometric symmetry, stylised motifs, and a strong emphasis on clean lines influenced by industrial modernism and cubism.

Platinum became the metal of choice during this period due to its strength and ability to hold securely set diamonds with minimal visible metal, often accented with calibre-cut precious gemstones.

Authentic pieces typically feature hand-cut diamonds such as old European cuts and baguettes, precise millegrain edging, open-work platinum galleries, and period-appropriate pin stems and safety catches.

Such pieces can be pinned to contemporary velvet lapels, silk scarves, or evening clutches to add a layer of historic texture and architectural contrast to minimalist outfits.

Clean regularly with a soft brush, warm water, and mild detergent, avoiding harsh chemicals, and store items individually in lined jewellery boxes to prevent scratching.
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