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sellingantiques.co.uk
ID #SA869851
FOR SALE
£4,800
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Art Deco Onyx and Diamonds Bar Brooch, 18kt Gold and Platinum, France, Circa 1920
Heritagem
for sale €5,616     $6,096
£4,800
Heritagem

Heritagem

Sellingantiques Verified Since Oct 2020
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    Heritagem is a registered member of LAPADA  CINOA
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Id #SA869851
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Art Deco Onyx and Diamonds Bar Brooch, 18kt Gold and Platinum, France, Circa 1920

1900 - 1920
For Sale by Heritagem
Description

Weight: 11.31gr

Metal: 18kt white gold and platinum

Condition: Very Good

Stones: 1 Diamond

• Total carat weight: 0.80ct approximately

• Cut: Old European

• Colour: H/I

• Clarity: SI

Others: 72 diamonds

• Total carat weight: 3.20ct approximately

• Cut: 6 old mine cut / 66 single cut

• Colour: H/I

• Clarity: VS/SI

Hallmarks: French, Eagle and Dog’s heads

Comments: This unique Bar brooch is from the Art Deco period. It is set with a plaque of onyx adorned with an old European cut diamond of 0.80ct approximately. It is set with 72 diamonds with a refined openwork and millegrain setting. It is made in platinum and the pin is in 18kt white gold. It is in very good condition.

Dimensions: Length: 7.6cm / 3in

Width: 9.45mm / 0.37in

All our items comes with either a gemmological report or a jewellery report with circa and all useful information.

Declaration

Heritagem has dated this Art Deco Onyx Brooch to the 1920s.

Reference Numbers
Sellingantiques Reference
SA869851
Dealers Internal Reference
9769
Dealers Notes

All our items come with either a gemmological report or a jewellery report with circa and all useful information.

Layaway are not accepted on sale items.

Returns are not accepted on sale items, on 50% off reduced items, and on items below $290 USD.

REFUND : Payment Processing fees will be deducted from the refund amount issued. Also if import or tax duties have to be paid upon return, these will be deducted from the refunded amount,

Description
Weight: 11.31gr

Metal: 18kt white gold and platinum

Condition: Very Good

Stones: 1 Diamond

• Total carat weight: 0.80ct approximately

• Cut: Old European

• Colour: H/I

• Clarity: SI

Others: 72 diamonds

• Total carat weight: 3.20ct approximately

fig 1. An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree.
fig 1. Art Deco Onyx and Diamonds Bar Brooch, 18kt Gold and Platinum, France, Circa 1920

• Cut: 6 old mine cut / 66 single cut

• Colour: H/I

• Clarity: VS/SI

Hallmarks: French, Eagle and Dog’s heads

Comments: This unique Bar brooch is from the Art Deco period. It is set with a plaque of onyx adorned with an old European cut diamond of 0.80ct approximately. It is set with 72 diamonds with a refined openwork and millegrain setting. It is made in platinum and the pin is in 18kt white gold. It is in very good condition.

Dimensions: Length: 7.6cm / 3in

Width: 9.45mm / 0.37in

“
All our items comes with either a gemmological report or a jewellery report with circa and all useful information.
Heritagem
Date of Manufacture

Heritagem has dated this Art Deco Onyx Brooch to the 1920s.

Reference Numbers
Sellingantiques Ref
SA869851
Dealers Internal Ref
9769
Heritagem
Heritagem
Sellingantiques verified Since Oct 2020
Dealer Profile

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

Trade Associations

Heritagem is a registered member of LAPADA  CINOA

Relevant Links
PDF SHARE
SAVE
An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree.
1 / 5
Archive I An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree.

Art Deco Onyx and Diamonds Bar Brooch, 18kt Gold and Platinum, France, Circa 1920

Archive II An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree. View II
Archive III An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree. View III
Archive IV An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree. View IV
Archive V An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree. View V
Enlarged Archival View
Heritagem

Heritagem
Telephone 020 7193 2281
Location
New Bond Street
London
United Kingdom
Dealer Profile Page sellingantiques.co.uk/heritagem
Verified Since Oct 2020
Items For Sale 28
Items Sold 269
Heritagem
Heritagem
Verified Since Oct 2020
View Dealer Info
Location: New Bond Street, London , United Kingdom
Profile: sellingantiques.co.uk/heritagem
Verified
Oct 2020
For Sale
28
Sold
269
An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree.
Art Deco Onyx and Diamonds Bar Brooch, 18kt gold and platinum, France, circa 1920
Ref: SA869851
An Art Deco horizontal platinum bar brooch featuring a central square black onyx plaque with a brilliant diamond, flanked by geometric diamond-paved filigree.
Detail View 1
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Archival Detail

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FAQs

Art Deco jewellery, originating in the 1920s, is characterised by linear symmetry, geometric patterns, bold colour contrasts, and fine craftsmanship reflecting modern industrial aesthetics.

Pieces from this era frequently feature platinum settings, 18kt gold backings, old European-cut diamonds, and carved black onyx or opaque gemstone accents.

Authentic period pieces exhibit precise hand-engraving, millegrain edging, platinum-faced construction, period French hallmarks, and era-appropriate gemstone cuts such as single or old European cuts.

An antique bar brooch can be worn on a coat lapel, secured at the neckline of a blouse, fastened to a silk scarf, or attached to a velvet ribbon to wear as a choker.

Clean gently with warm water and mild liquid soap using a soft brush, ensuring porous materials like onyx are wiped dry immediately and avoiding ultrasonic cleaners.
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