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ID #SA1057222
FOR SALE
£6,800
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Art Deco 1.13 Carat Old Cut Diamond Engagement Ring, Circa 1930
For sale by Gatsby Jewellery Ltd
for sale €7,956     $8,636
£6,800
Gatsby Jewellery Ltd

Gatsby Jewellery Ltd

Sellingantiques Verified Since May 2014
Browse dealers 276 items
  • About Us
    Gatsby jewellery are a husband and wife team who have years of knowledge and experience in dealing in fine antique jewellery.
Id #SA1057222
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Art Deco 1.13 Carat Old Cut Diamond Engagement Ring, Circa 1930

1920 - 1940
Description

A fine Art Deco engagement ring. The old European cut diamond in the centre – graded by De Beers as G colour, SI2 clarity – a fizzing with fire and brilliance. The stone is secured in an eight-claw cornet collet. Each shoulders is set with six rose cut diamond in a geometric step-down design, leading to a slender platinum shank.

Accompanied by a De Beers Institute of Diamonds grading report (#010000277035). A unique number has been inscribed on this diamond providing utmost security.

Cut – Old European cut in the centre, rose cuts in the shoulders.

Colour – The centre is G, the diamonds in the shoulders are G to H.

Clarity – The centre is SI2 (clean to the naked eye). The diamonds in the shoulders SI1 to SI3.

Carat – The centre is 1.13 carat, with a further approximate 0.09 carat in the shoulders.

Circa – 1930.

Size – R (UK) or 8 5/8 (US). Complimentary sizing is available, can be sized up or down.

Measurements – The centre is 6.61 x 6.40mm and sits 7.2mm from the finger.

Weight – 4.46 grams.

Metal – Stamped PLAT and tests as platinum.

Date of Manufacture

Gatsby Jewellery Ltd has dated this Art Deco Engagement Ring to the 1930s.

Independent Date Guide ID 08400554
Dealer's Item Date1930s
Sellingantiques Date1930s
Sellingantiques agingItem 85-105 years old
ResultsDates match
Why Sellingantiques dated this piece to THE 1930s:
Stepped geometric shoulders with millegrain borders: characteristic Art Deco design.
Eight-claw pierced cornet collet: openwork setting style favoured in the 1930s.
Old European cut centre diamond: hand-faceted proportions with a distinct open culet.
PLAT stamp to inner shank: standard platinum mark used from the 1920s onward.

This Independent Date Guide was compiled by Sellingantiques using its own proprietary system. It works only from the photographs shown on this page and is never told the date the dealer has declared. It is a guide, not a guarantee of age, and occasional errors can occur.

Reference Numbers
Sellingantiques Reference
SA1057222
Dealers Internal Reference
610312S052
Description
A fine Art Deco engagement ring.
“
The old European cut diamond in the centre – graded by De Beers as G colour, SI2 clarity – a fizzing with fire and brilliance.
Gatsby Jewellery Ltd

The stone is secured in an eight-claw cornet collet. Each shoulders is set with six rose cut diamond in a geometric step-down design, leading to a slender platinum shank.

fig 1. An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds.
fig 1. Art Deco 1.13 Carat Old Cut Diamond Engagement Ring, Circa 1930

Accompanied by a De Beers Institute of Diamonds grading report (#010000277035). A unique number has been inscribed on this diamond providing utmost security.

Cut – Old European cut in the centre, rose cuts in the shoulders.

fig 2. An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds.
fig 2. Art Deco 1.13 Carat Old Cut Diamond Engagement Ring, Circa 1930

Colour – The centre is G, the diamonds in the shoulders are G to H.

Clarity – The centre is SI2 (clean to the naked eye). The diamonds in the shoulders SI1 to SI3.

Carat – The centre is 1.13 carat, with a further approximate 0.09 carat in the shoulders.

fig 3. An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds.
fig 3. Art Deco 1.13 Carat Old Cut Diamond Engagement Ring, Circa 1930

Circa – 1930.

Size – R (UK) or 8 5/8 (US). Complimentary sizing is available, can be sized up or down.

Measurements – The centre is 6.61 x 6.40mm and sits 7.2mm from the finger.

Weight – 4.46 grams.

Metal – Stamped PLAT and tests as platinum.

Date of Manufacture

Gatsby Jewellery Ltd has dated this Art Deco Engagement Ring to the 1930s.

Independent Date Report ID 08400554
Dealer's Item Date1930s
Sellingantiques dating1930s
Sellingantiques agingItem 85-105 years old
ResultsDates match
Why Sellingantiques dated this piece to the 1930s:
Stepped geometric shoulders with millegrain borders: characteristic Art Deco design.
Eight-claw pierced cornet collet: openwork setting style favoured in the 1930s.
Old European cut centre diamond: hand-faceted proportions with a distinct open culet.
PLAT stamp to inner shank: standard platinum mark used from the 1920s onward.

This is an independent date report produced by Sellingantiques using its own proprietary system. The process uses the photographs shown on this page. The system is never told the date the dealer has declared. This report shows that the two dates corroborate.

Reference Numbers
Sellingantiques Ref
SA1057222
Dealers Internal Ref
610312S052
Gatsby Jewellery Ltd
Gatsby Jewellery Ltd
Sellingantiques verified Since May 2014

Gatsby jewellery are a husband and wife team who have years of knowledge and experience in dealing in fine antique jewellery.

Dealer Profile

You can view the stock and full dealer information on the Gatsby Jewellery Ltd Profile Page

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An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds.
1 / 10
Archive I An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds.

Art Deco 1.13 Carat Old Cut Diamond Engagement Ring, Circa 1930

Archive II An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View II
Archive III An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View III
Archive IV An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View IV
Archive V An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View V
Archive VI An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View VI
Archive VII An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View VII
Archive VIII An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View VIII
Archive IX An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View IX
Archive X An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds. View X
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Gatsby Jewellery Ltd

Gatsby Jewellery Ltd
Telephone 01992 842 123
Location
Gatsby Jewellery Ltd
3 Coppice Row
Theydon Bois
Essex
CM16 7ES
United Kingdom
Dealer Profile Page sellingantiques.co.uk/gatsby
Verified Since May 2014
Items For Sale 276
Items Sold 2,983
Gatsby Jewellery Ltd
Gatsby Jewellery Ltd
Verified Since May 2014
View Dealer Info
Location: Gatsby Jewellery Ltd, 3 Coppice Row, Theydon Bois, Essex, CM16 7ES, United Kingdom
Profile: sellingantiques.co.uk/gatsby
Verified
May 2014
For Sale
276
Sold
2,983
An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds.
Art Deco 1.13 Carat Old Cut Diamond Engagement Ring, circa 1930
Ref: SA1057222
An Art Deco platinum engagement ring featuring a central round old European cut diamond flanked by geometric stepped shoulders set with accent diamonds.
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Cataloguer’s note

Written by Sellingantiques from the dealer’s photographs and listing
  • ObjectRings
  • Period1920 - 1940
  • StyleArt Deco
  • MaterialPlatinum, Diamond
  • ColourSilver, White
  • MotifsOld European cut diamond, Stepped shoulders, Milgrain detailing, Geometric setting

This Art Deco engagement ring originates from circa 1930 and is fashioned from platinum with a silver and white colour palette. The piece showcases a central round old European cut diamond secured in an eight-claw cornet collet, flanked by geometric stepped shoulders set with six accent rose cut diamonds on each side. The setting incorporates milgrain detailing alongside the slender platinum shank. Additional visible design elements include the graduated step-down architecture of the shoulders, the high-set mounting profile, and the delicate prong arrangement holding the principal stone. Size is R in the UK and 8 5/8 in the US. Suitable for daily wear as an engagement ring or statement piece, it pairs well with traditional and contemporary jewellery collections. The platinum metal and sparkling diamond facets catch the light from multiple angles, bringing a distinct period aesthetic to everyday attire. Its slim band ensures comfortable placement on the hand while retaining a secure fit.

FAQs

Art Deco jewellery, prominent during the 1920s and 1930s, is characterised by geometric shapes, symmetrical patterns, clean architectural lines, and the extensive use of platinum alongside diamonds and contrasting gemstones.

Art Deco rings were predominantly crafted using platinum or white gold for strength and a bright white finish, featuring hand-cut diamonds such as old European or transitional cuts, often detailed with fine milgrain borders.

Authentic pieces display period-specific features including old European or old mine cut diamonds with hand-faceted proportions, geometric shoulder detailing, hand-drawn milgrain edges, and vintage metal fineness hallmarks.

Art Deco rings integrate easily with contemporary wardrobes, complementing either minimalist modern metal bands or vintage-inspired pave eternity rings for a layered mixed-era aesthetic.

Clean gently using warm water, mild liquid soap, and a soft-bristled brush to remove dust from behind the setting, and schedule periodic professional inspections to ensure claws and settings remain secure.
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