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sellingantiques.co.uk
ID #SA579320
FOR SALE
£14,500
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Art Deco 2.40 Carat Old Cut Diamond & Onyx Ring, Circa 1920
Gatsby Jewellery Ltd
for sale €16,965     $18,415
£14,500
Gatsby Jewellery Ltd

Gatsby Jewellery Ltd

Sellingantiques Verified Since May 2014
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  • About Us
    Gatsby jewellery are a husband and wife team who have years of knowledge and experience in dealing in fine antique jewellery.
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Id #SA579320
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Art Deco 2.40 Carat Old Cut Diamond & Onyx Ring, Circa 1920

1900 - 1920
Description

This utterly stunning diamond and onyx ring simply aches with Art Deco charm. The old European cut diamond in the centre is rubover and milgrain set in platinum, and sits at the centre of a large rectangular bed of deep black onyx – a stunning contrast between the brightness of the diamond and its surround. The head of the ring sits on a simple double gallery, leading to a slim platinum shank.

Cut – Old European cut.

Colour – K.

Clarity – SI3.

Carat – The diamond is approximately 2.40 carat.

Circa – 1920.

Size – K (UK) or 5 1/8 (US). Complimentary sizing is available, can be sized up or down.

Measurements – The head of the ring is 15.1 x 12mm. Sits 6.5mm from the finger.

Metal – Platinum. Tested.

Video – To view a video of this ring recorded in daylight, please copy / paste the following link into your browser: https://vimeo.com/827274376?

Physical Dimensions
Height
30cm (11.81")
Width
25cm (9.84")
Depth
5cm (1.97")
Declaration

Gatsby Jewellery Ltd has dated this Art Deco Onyx Ring to the 1920s.

Reference Numbers
Sellingantiques Reference
SA579320
Dealers Internal Reference
16106S020
Description
This utterly stunning diamond and onyx ring simply aches with Art Deco charm. The old European cut diamond in the centre is rubover and milgrain set in platinum, and sits at the centre of a large rectangular bed of deep black onyx – a stunning contrast between the brightness of the diamond and its surround. The head of the ring sits on a simple double gallery, leading to a slim platinum shank.
fig 1. Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque.
fig 1. Art Deco 2.40 Carat Old Cut Diamond & Onyx Ring, Circa 1920

Cut – Old European cut.

Colour – K.

Clarity – SI3.

Carat – The diamond is approximately 2.40 carat.

Circa – 1920.

Size – K (UK) or 5 1/8 (US). Complimentary sizing is available, can be sized up or down.

Measurements – The head of the ring is 15.1 x 12mm. Sits 6.5mm from the finger.

Metal – Platinum. Tested.

“
Video – To view a video of this ring recorded in daylight, please copy / paste the following link into your browser: https://vimeo.
Gatsby Jewellery Ltd

com/827274376?

Height
30cm (11.81")
Width
25cm (9.84")
Depth
5cm (1.97")
Date of Manufacture

Gatsby Jewellery Ltd has dated this Art Deco Onyx Ring to the 1920s.

Reference Numbers
Sellingantiques Ref
SA579320
Dealers Internal Ref
16106S020
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

Relevant Links
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Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque.
1 / 7
Archive I Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque.

Art Deco 2.40 Carat Old Cut Diamond & Onyx Ring, Circa 1920

Archive II Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque. View II
Archive III Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque. View III
Archive IV Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque. View IV
Archive V Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque. View V
Archive VI Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque. View VI
Archive VII Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque. View VII
Enlarged Archival View
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 264
Items Sold 2,933
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
264
Sold
2,933
Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque.
Art Deco 2.40 Carat Old Cut Diamond & Onyx Ring, circa 1920
Ref: SA579320
Art Deco platinum ring featuring a central round diamond set within a rectangular black onyx plaque.
Detail View 1
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Detail View 5
Detail View 6
Archival Detail

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FAQs

Originating in the 1920s, Art Deco jewellery is defined by bold geometric shapes, sharp contrast, and architectural influences. The combination of opaque black onyx with brilliant white diamonds set in platinum became a hallmark of the eras aesthetic.

Rings from this era were primarily constructed using platinum or 18-carat white gold to support intricate gem-setting. Centred diamonds were typically old European or mine cuts, set directly into carved black onyx, chalcedony, or enamel plaques.

Authentic pieces exhibit hand-cut gemstones, old European cut diamonds with open culets and high crowns, precise milgrain borders, and period-accurate hallmarks inside the shank alongside platinum or gold purity stamps.

A geometric Art Deco cocktail ring serves as a focal piece when worn independently on the index or middle finger. It pairs seamlessly with modern monochrome tailoring, evening attire, or minimal platinum bands.

Onyx is a porous quartz variety sensitive to harsh chemicals, steam, and ultrasonic cleaners. Clean the ring using warm water, mild liquid soap, and a soft-bristled toothbrush, ensuring the setting is dried thoroughly with a lint-free cloth.
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