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ID #SA903497
FOR SALE
£1,795
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Edwardian French Tank 18ct Platinum Blue Topaz Diamond Set Ring
Crispin Jewellery
for sale €2,100     $2,280
£1,795

Crispin Jewellery

Sellingantiques Verified Since Oct 2018
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Id #SA903497
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Edwardian French Tank 18ct Platinum Blue Topaz Diamond Set Ring

1920 - 1940
Description

A stunning Edwardian / 1930s large diamond pave set ring set into platinum and 18ct yellow gold, though this antique yellow gold has a rose gold hue as per many antique French rings

HALLMARKS

Not Hallmarked so tested as

MEASUREMENTS

Central blue topaz; I am selling as at least blue topaz, it could well be Aquamarine. Tests as a natural stone with no enhancement. Measures 12.5 x 10mm

Old eight cut diamonds; 2mm

Total ring head 24 x 12.5mm

Ring sits 8mm from the finger

Diamond clarity; Si2-VS2

Diamond colour; J

Weights ; 11g

Ring size GB L, the ring has a thick band to the rear and spreads on the sizing gauge from k 3/4 - l 1/4

STUNNING DESIGN

CONDITION

Good condition, signs of wear commensurate of age.

Stunning genuine period ring

Physical Dimensions
Height
1.2cm (0.47")
Width
2.4cm (0.94")
Depth
1cm (0.39")
Declaration

Crispin Jewellery has dated this Topaz Diamond Tank Ring to the 1930s.

Reference Numbers
Sellingantiques Reference
SA903497
Description
A stunning Edwardian / 1930s large diamond pave set ring set into platinum and 18ct yellow gold, though this antique yellow gold has a rose gold hue as per many antique French rings

HALLMARKS

Not Hallmarked so tested as

fig 1. An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds.
fig 1. Edwardian French Tank 18ct Platinum Blue Topaz Diamond Set Ring

MEASUREMENTS

Central blue topaz; I am selling as at least blue topaz, it could well be Aquamarine. Tests as a natural stone with no enhancement. Measures 12.5 x 10mm

Old eight cut diamonds; 2mm

Total ring head 24 x 12.5mm

fig 2. An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds.
fig 2. Edwardian French Tank 18ct Platinum Blue Topaz Diamond Set Ring

Ring sits 8mm from the finger

Diamond clarity; Si2-VS2

Diamond colour; J

Weights ; 11g

“
Ring size GB L, the ring has a thick band to the rear and spreads on the sizing gauge from k 3/4 - l 1/4.
Crispin Jewellery

STUNNING DESIGN

CONDITION

Good condition, signs of wear commensurate of age.

Stunning genuine period ring

Height
1.2cm (0.47")
Width
2.4cm (0.94")
Depth
1cm (0.39")
Date of Manufacture

Crispin Jewellery has dated this Topaz Diamond Tank Ring to the 1930s.

Reference Numbers
Sellingantiques Ref
SA903497
Crispin Jewellery
Sellingantiques verified Since Oct 2018
Dealer Profile

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

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An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds.
1 / 6
Archive I An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds.

Edwardian French Tank 18ct Platinum Blue Topaz Diamond Set Ring

Archive II An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds. View II
Archive III An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds. View III
Archive IV An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds. View IV
Archive V An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds. View V
Archive VI An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds. View VI
Enlarged Archival View

Crispin Jewellery
Telephone 07790 416 633
Location
PO Box 1409
Hertfordshire
HP19NU
United Kingdom
Dealer Profile Page sellingantiques.co.uk/crispinjewellery
Verified Since Oct 2018
Items For Sale 251
Items Sold 458
Crispin Jewellery
Verified Since Oct 2018
View Dealer Info
Location: PO Box 1409, Hertfordshire, HP19NU, United Kingdom
Profile: sellingantiques.co.uk/crispinjewellery
Verified
Oct 2018
For Sale
251
Sold
458
An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds.
EDWARDIAN FRENCH TANK 18CT PLATINUM BLUE TOPAZ DIAMOND SET RING
Ref: SA903497
An antique French Tank ring featuring an oval faceted light blue topaz set in gold, framed by broad platinum shoulders set with small accent diamonds.
Detail View 1
Detail View 2
Detail View 3
Detail View 4
Detail View 5
Archival Detail

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FAQs

Originating in the early 20th century and continuing through the Art Deco period, French Tank jewellery is characterised by bold, architectural geometry inspired by military tanks and structural engineering. These designs feature wide metal bands, clean rectangular profiles, and prominent gemstone settings.

Tank rings typically utilise 18ct yellow or rose gold, frequently layered with platinum or white gold accents to set diamonds and central gemstones. High-carat coloured gemstones such as topaz, aquamarine, or citrine were commonly cut into oval, emerald, or rectangular shapes.

Authentic French pieces feature specific hallmarks, such as the eagles head for 18ct gold or the dogs head for platinum, often stamped on the exterior of the shank. Construction features include hand-set pave accent diamonds, heavy gram weights, and structured underframing characteristic of period metalwork.

A Tank ring serves as a central statement piece due to its substantial architectural volume and wide band structure. It pairs effectively with minimalist gold or platinum bands on adjacent fingers, allowing the geometric profile to remain the primary focal point.

Clean the piece gently using warm water, mild soap, and a soft-bristled brush to remove build-up beneath the central setting. Avoid chemical solvents or ultrasonic cleaners, and store the ring individually in a soft cloth pouch to protect the metals and gemstones from abrasion.
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