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ID #SA1173784
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£1,995
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Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945
AC Silver
for sale €2,334     $2,534
£1,995
AC Silver

AC Silver

Sellingantiques Verified Since Apr 2009
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    Welcome to ac silver antique silver and antique jewellery specialists since 1977
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Id #SA1173784
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Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

1920 - 1940
For Sale by AC Silver
Description

A fine and impressive vintage 2.40 carat black onyx and 0.10 carat diamond, 14 carat yellow gold signet ring; part of our diverse vintage jewellery and estate jewelry collections.

This fine and impressive vintage onyx ring has been crafted in 14ct yellow gold.

The substantial scroll and bead decorated ring mount is ornamented with a collet set rectangular cut cornered black onyx panel.

The onyx panel is accented with a collet set 0.10ct transitional modern brilliant round cut diamond.

The subtly elevated, flared ring shoulders blend seamlessly with the plain ring shank.

This impressive diamond and onyx signet ring has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as 14 carat gold.

This impressive ring is supplied with an IDGL diamond and gemstone grading report card.

This vintage diamond and onyx signet ring in gold is a striking and refined piece, ideal for both gifting and personal acquisition. It makes a distinguished present for milestone birthdays or anniversaries, and is equally suited to mark graduations, promotions or retirements- symbolising achievement, sophistication and timeless style.

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.

Condition

This impressive vintage gold onyx signet ring is excellent quality, set with an impressive onyx panel displaying fine colour and presence.

The impressive diamond displays a fine white colour and brilliance.

This gents onyx ring is an excellent gauge of gold and is in excellent condition.

Reflections in photographs may detract from the true representation of this fine example of vintage onyx jewellery.

Onyx Quality

Cut Panel

Content 2.40 carats

Dimensions 11.75mm (length) x 10.20mm (width) x 2.73mm (depth)

Diamond Quality

Colour (average grades) H

Clarity (average grades) VS2

Cut Transitional Modern Brilliant Round

Content 0.10 carat

Number of Diamonds

1

Dimensions

Width of setting 1.45cm/0.57'

Height of setting 7.14mm/0.28'

Ring Size

UK Size U 1/2

USA Size 10 1/2

The ring size may be professionally adjusted in size on request to meet your personal requirements.

Weight

5.84 grams

Date: Circa 1945

A video is available upon request.

Physical Dimensions
Height
0.7cm (0.28")
Width
1.4cm (0.55")
Declaration

AC Silver has dated this Onyx Diamond Signet Ring to the 1940s.

Reference Numbers
Sellingantiques Reference
SA1173784
Dealers Internal Reference
C9467
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 fine and impressive vintage 2.40 carat black onyx and 0.
10 carat diamond, 14 carat yellow gold signet ring; part of our diverse vintage jewellery and estate jewelry collections.
AC Silver

This fine and impressive vintage onyx ring has been crafted in 14ct yellow gold.

fig 1. A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
fig 1. Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

The substantial scroll and bead decorated ring mount is ornamented with a collet set rectangular cut cornered black onyx panel.

The onyx panel is accented with a collet set 0.10ct transitional modern brilliant round cut diamond.

fig 2. A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
fig 2. Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

The subtly elevated, flared ring shoulders blend seamlessly with the plain ring shank.

This impressive diamond and onyx signet ring has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as 14 carat gold.

fig 3. A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
fig 3. Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

This impressive ring is supplied with an IDGL diamond and gemstone grading report card.

This vintage diamond and onyx signet ring in gold is a striking and refined piece, ideal for both gifting and personal acquisition. It makes a distinguished present for milestone birthdays or anniversaries, and is equally suited to mark graduations, promotions or retirements- symbolising achievement, sophistication and timeless style.

fig 4. A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
fig 4. Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

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.

Condition

This impressive vintage gold onyx signet ring is excellent quality, set with an impressive onyx panel displaying fine colour and presence.

fig 5. A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
fig 5. Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

The impressive diamond displays a fine white colour and brilliance.

This gents onyx ring is an excellent gauge of gold and is in excellent condition.

Reflections in photographs may detract from the true representation of this fine example of vintage onyx jewellery.

fig 6. A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
fig 6. Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

Onyx Quality

Cut Panel

Content 2.40 carats

Dimensions 11.75mm (length) x 10.20mm (width) x 2.73mm (depth)

Diamond Quality

Colour (average grades) H

Clarity (average grades) VS2

Cut Transitional Modern Brilliant Round

fig 7. A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
fig 7. Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

Content 0.10 carat

Number of Diamonds

1

Dimensions

Width of setting 1.45cm/0.57'

Height of setting 7.14mm/0.28'

Ring Size

UK Size U 1/2

USA Size 10 1/2

The ring size may be professionally adjusted in size on request to meet your personal requirements.

Weight

5.84 grams

Date: Circa 1945

A video is available upon request.

Height
0.7cm (0.28")
Width
1.4cm (0.55")
Date of Manufacture

AC Silver has dated this Onyx Diamond Signet Ring to the 1940s.

Reference Numbers
Sellingantiques Ref
SA1173784
Dealers Internal Ref
C9467
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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A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
1 / 11
Archive I A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.

Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945

Archive II A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View II
Archive III A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View III
Archive IV A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View IV
Archive V A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View V
Archive VI A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View VI
Archive VII A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View VII
Archive VIII A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View VIII
Archive IX A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View IX
Archive X A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View X
Archive XI A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting. View XI
Enlarged Archival View
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 459
Items Sold 103
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
Verified
Apr 2009
For Sale
459
Sold
103
A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
Vintage 2.40ct Black Onyx and Diamond 14ct Yellow Gold Signet Ring Circa 1945
Ref: SA1173784
A 14ct yellow gold signet ring set with an octagonal black onyx plaque featuring a central round diamond bezel setting.
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Every single antique dealer on our platform is individually approved by our internal team. We verify their professional trade history, ethical standards, and photographic quality to ensure a secure, high-standard buying environment. Upon joining, every dealer agrees to a strict 9-point code of conduct. While issues can occasionally arise, our dealers typically resolve them swiftly and directly with the buyer. In fact, since our founding in 2002, Sellingantiques has only had to step in to help resolve an issue on roughly five occasions—a true testament to the quality of our dealers and their dedication to your happiness.
Our dealers are highly experienced in packing and shipping fragile, high-value antiques. Because you are in direct contact with the dealer, you will be able to easily go through all available shipping and insurance options together to ensure your item arrives safely.
Antiques are the ultimate green purchase. By choosing historical pieces over newly manufactured goods, you completely eliminate the carbon footprint of modern mass production while preserving exceptional, timeless craftsmanship.

Signet rings historically served as personal markers or seals for signature verification. By the mid-20th century, materials such as black onyx were frequently set into gold signet designs to create contrasting geometric patterns, blending practical traditional forms with decorative style.

Mid-20th-century signet rings commonly feature yellow gold mounts crafted in 10ct, 14ct, or 18ct purity. Hardstones such as onyx, agate, and bloodstone were frequently carved or inset with brilliant-cut or single-cut accent diamonds.

Authentic pieces from the 1940s often feature distinctive hallmarks denoting gold purity alongside makers marks. Design elements typically include bold geometric lines, pierced or sculpted shoulders, and bezel-set central stones characteristic of the era.

A vintage signet ring can be worn as a standalone statement piece on the pinky or index finger. Its clean geometric design allows it to coordinate naturally with modern gold bands and tailored attire.

Clean onyx and gold rings using a soft microfibre cloth with warm water and mild liquid soap. Avoid steam cleaners, ultrasonic treatments, and harsh chemicals, as onyx is a porous mineral that can absorb moisture or sustain surface damage.
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