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1.20 ct Siam Ruby and 1.09 ct Diamond, 18 ct Yellow Gold Dress Ring - Antique Circa 1920

A stunning, fine and impressive antique 1.20ct Siam ruby and 1.09 carat diamond, 18 carat yellow gold and platinum set dress ring; part of our diverse antique jewellery and estate jewelry collections

SKU: C4007

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1.20 ct Siam Ruby and 1.09 ct Diamond, 18 ct Yellow Gold Dress Ring - Antique Circa 1920 Video
Non Heat Treated Ruby Ring
1.20 ct Siam Ruby and 1.09 ct Diamond, 18 ct Yellow Gold Dress Ring - Antique Circa 1920


This stunning antique ruby ring has been crafted in 18 ct yellow gold with a platinum setting.

The pierced decorated setting is ornamented with a feature platinum collet set natural Siam ruby to the centre of the design.

The ruby is surrounded by a separate frame composed of sixteen impressive pavé set Old European round cut diamonds, totalling 1.09ct, displayed within a scalloped edged, quadrilateral shaped halo.

The elevated, pierced decorated and tapering platinum ring shoulders integrate with the main setting and blend seamlessly with the 18ct yellow gold ring shank.

The interior of the shank is hallmarked with the maker's mark (SU LD) and the mark for 18ct gold (18CT), in addition to the registration number (B3760).

This antique cocktail ring has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as 18ct gold and platinum.

The Siam ruby ring is supplied with an independent diamond grading report card for the diamonds, in addition to a ruby report card and certificate supplied by the Gemmological Certification Services, London*.

NOTE: * This documentation accredits the ruby originating in Thailand (Siam) and certifies that the gemstone shows no indications of heating; non-heated rubies are a scarcity.

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.

View the complete range of ruby jewellery at AC Silver

AC Silver


This impressive dress ring is exceptional quality set with a stunning natural Siam ruby displaying fine colour, brilliance and presence.

The Old European cut diamonds are very well colour matched and display a fine white colour and brilliance.

The ring is an exceptional gauge of gold and platinum.

The ring is in excellent condition, with very clear deeply struck hallmarks to the interior of the shank.

Reflections in photographs may detract from the true representation of this exceptional non heat treated ruby ring.

Ruby Quality

Colour Red

Cut Cushion

Content 1.20 carat

Origin Thailand (Siam)

Dimensions 6.3mm x 5.7mm x 3.6mm

Diamond Quality

Colour (average grades) G

Clarity (average grades) SI1

Cut Old European

Content (total) 1.09 carat


Length of Setting 1.8cm/0.71"

Width of Setting 1.442cm/0.57"

Height of Setting 4mm/0.16"

Ring Size

UK Size O

USA Size 7

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


3.71 grams

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Andrew Campbell started trading in antiques during the 1970s. Initially, Andrew lived in the South of England, travelling the country, searching for items of silver to buy. Andrew sold these items at various London markets and antique fairs. Over time, and through selling at a range of venues, Andrew built up a large and diverse customer base from private buyers to national and international trade customers.
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