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Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting
Sold by The Chelsea Bijouterie Ltd
sold SA1208126
Sorry, but this item has been sold.

The Chelsea Bijouterie Ltd

Sellingantiques Verified Since Nov 2018
Browse dealers 175 items
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Id #SA1208126
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Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

1900 - 1920
Sold 8 June 2026 · The Chelsea Bijouterie Ltd
This “Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting” found a buyer.

It was listed by The Chelsea Bijouterie Ltd. 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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Description

A timeless and elegant 1920s diamond trilogy ring, beautifully crafted in 18ct gold with a platinum setting, embodying the refined geometry and craftsmanship of the Art Deco period.

The three diamonds are set within finely chiselled star-shaped illusion mounts, a hallmark of the era, designed to reflect light and enhance the apparent size and brilliance of each stone. The central diamond is flanked by two smaller stones, forming a classic trilogy design symbolising past, present and future.

The square-shaped head and delicate milgrain edging lend a crisp, architectural quality, while the beautifully pierced gallery adds further charm and craftsmanship. Light, refined and wonderfully wearable, this ring makes a particularly attractive and meaningful engagement ring.

Art Deco period, circa 1920s

18ct gold shank with platinum setting

Diamond trilogy design

Three brilliant cut diamonds

Total diamond weight approx. 0.15 carat

Colour: H/I

Clarity: VS1

Centre diamond approx. 2.7mm

Outer diamonds approx. 2mm each

Star-shaped illusion settings enhance size and sparkle

Square cluster head design

Attractive pierced gallery

Head stands approx. 4mm proud of the shank

Ring size: N (UK) / 6.75 (US)

Easily resized

Weight: 2.5 grams

Marked “18CT PLAT”

Excellent condition

Presented in the box illustrated

Our ref: 2610

Please visit our website to view our full collection:

https://www.the-chelsea-bijouterie.com

Payment:

By Debit/ Credit Card, PayPal or Bank Transfer

Shipping:

We post worldwide free of charge

All items are sent fully insured, tracked and signed for.

Terms of Sale:

We are totally committed to customer satisfaction. We take great care to give accurate and detailed descriptions accompanied by high definition photos. If you are not entirely happy with your purchase we will gladly offer you a full refund. Please return within 14 days of receipt of your purchase.

About Us:

We have years of knowledge and experience in dealing in antiques and antique & designer jewellery. We are committed to giving exceptional customer service. The Chelsea Bijouterie aims to offer beautiful and interesting items at affordable prices.

Declaration

The Chelsea Bijouterie Ltd has dated this Art Deco Diamond Ring to the 1920s.

Reference Numbers
Sellingantiques Reference
SA1208126
Dealers Internal Reference
2610
Description
A timeless and elegant 1920s diamond trilogy ring, beautifully crafted in 18ct gold with a platinum setting, embodying the refined geometry and craftsmanship of the Art Deco period.
“
The three diamonds are set within finely chiselled star-shaped illusion mounts, a hallmark of the era, designed to reflect light and enhance the apparent size and brilliance of each stone.
The Chelsea Bijouterie Ltd

The central diamond is flanked by two smaller stones, forming a classic trilogy design symbolising past, present and future.

fig 1. Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
fig 1. Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

The square-shaped head and delicate milgrain edging lend a crisp, architectural quality, while the beautifully pierced gallery adds further charm and craftsmanship. Light, refined and wonderfully wearable, this ring makes a particularly attractive and meaningful engagement ring.

fig 2. Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
fig 2. Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

Art Deco period, circa 1920s

18ct gold shank with platinum setting

Diamond trilogy design

Three brilliant cut diamonds

Total diamond weight approx. 0.15 carat

Colour: H/I

Clarity: VS1

Centre diamond approx. 2.7mm

fig 3. Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
fig 3. Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

Outer diamonds approx. 2mm each

Star-shaped illusion settings enhance size and sparkle

Square cluster head design

Attractive pierced gallery

Head stands approx. 4mm proud of the shank

Ring size: N (UK) / 6.75 (US)

fig 4. Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
fig 4. Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

Easily resized

Weight: 2.5 grams

Marked “18CT PLAT”

Excellent condition

Presented in the box illustrated

Our ref: 2610

Please visit our website to view our full collection:

https://www.the-chelsea-bijouterie.com

fig 5. Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
fig 5. Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

Payment:

By Debit/ Credit Card, PayPal or Bank Transfer

Shipping:

We post worldwide free of charge

All items are sent fully insured, tracked and signed for.

Terms of Sale:

We are totally committed to customer satisfaction. We take great care to give accurate and detailed descriptions accompanied by high definition photos. If you are not entirely happy with your purchase we will gladly offer you a full refund. Please return within 14 days of receipt of your purchase.

fig 6. Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
fig 6. Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

About Us:

We have years of knowledge and experience in dealing in antiques and antique & designer jewellery. We are committed to giving exceptional customer service. The Chelsea Bijouterie aims to offer beautiful and interesting items at affordable prices.

Date of Manufacture

The Chelsea Bijouterie Ltd has dated this Art Deco Diamond Ring to the 1920s.

Reference Numbers
Sellingantiques Ref
SA1208126
Dealers Internal Ref
2610
The Chelsea Bijouterie Ltd
Sellingantiques verified Since Nov 2018
Dealer Profile

You can view the stock and full dealer information on the The Chelsea Bijouterie Ltd Profile Page

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Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. SOLD8 JUN 26
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Archive I Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. SOLD8 JUN 26

Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting

Archive II Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View II
Archive III Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View III
Archive IV Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View IV
Archive V Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View V
Archive VI Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View VI
Archive VII Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View VII
Archive VIII Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View VIII
Archive IX Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band. View IX
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The Chelsea Bijouterie Ltd
Telephone 07949 058 591
Location
85 Great Portland Street
London
W1W 7LT
United Kingdom
Dealer Profile Page sellingantiques.co.uk/thechelseabijouterie
Verified Since Nov 2018
Items For Sale 175
Items Sold 890
The Chelsea Bijouterie Ltd
Verified Since Nov 2018
View Dealer Info
Location: 85 Great Portland Street, London, W1W 7LT, United Kingdom
Profile: sellingantiques.co.uk/thechelseabijouterie
Verified
Nov 2018
For Sale
175
Sold
890
Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
Art Deco Diamond Trilogy Ring 18ct Gold Platinum Illusion Setting
Ref: SA1208126
Close-up of an Art Deco trilogy diamond ring featuring an illusion setting in platinum on an 18ct gold band.
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Cataloguer’s note

Written by Sellingantiques from the dealer’s photographs and listing
  • ObjectRings
  • Period1900 - 1920
  • StyleArt Deco
  • Material18ct Gold, Platinum, Diamond
  • ColourSilver and Gold
  • MotifsGeometric setting, Millegrain edging, Trilogy layout, Illusion facets

FAQs

Art Deco jewellery, prominent from the 1920s to the 1930s, is characterised by geometric symmetry, clean lines, and a heavy influence from industrial design and modernist art.

Traditional construction often combined yellow gold bands with platinum settings to securely hold diamonds and enhance their white brilliance against a contrasting metal.

Authentic illusion settings feature faceted metal plates surrounding smaller diamonds to create the optical illusion of a larger single stone, often finished with delicate millegrain edging.

Antique rings can be paired with contemporary minimalist bands for a curated stack, or worn alone as a statement piece to contrast with modern attire.

Regular inspection by a jeweller ensures the security of older settings and stones, while gentle cleaning with warm soapy water and a soft brush maintains the metal and diamond sparkle.
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