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2.56 ct Diamond and Black Onyx, Platinum Dress Ring - Art Deco - Antique Circa 1920

A stunning, fine and impressive antique Art Deco 2.56 carat (total) diamond and black onyx, dress ring crafted in platinum; part of our diverse antique jewellery and collections

SKU: A6384

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2.56 ct Diamond and Black Onyx, Platinum Dress Ring - Art Deco - Antique Circa 1920 Video
Diamond & Onyx Ring
2.56 ct Diamond and Black Onyx, Platinum Dress Ring - Art Deco - Antique Circa 1920


This fine and impressive antique diamond and onyx ring has been crafted in platinum.

The iconic Art Deco pierced decorated, cut-cornered rectangular setting displays a feature 2.35 ct Old European round cut diamond collet set to the centre of a rectangular black onyx panel.

A total of ten pavé set eight-cut diamonds embellish the upper and lower borders of the design.

The elevated, pierced decorated ring shoulders are each accented with two pavé set eight-cut diamonds and blend seamlessly with the plain shank.

The shank is hallmarked to the outer surface of the shank, however this is worn and illegible and therefore has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

Due to the style of the ring, and the location of the hallmark, there is a strong probability of French origin.

This women's black onyx ring with diamonds is supplied with an independent diamond grading certificatefor the feature diamond in addition to an independent diamond grading report card for the supporting ston es.

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 Art Deco jewellery at AC Silver

AC Silver


This stunning Art Deco dress ring is fine quality set with very well colour matched, very high colour graded old cut diamonds.

Although clarity graded at a P1, the feature diamond displays a fine brilliance.

The ring is a very good gauge of platinum and is in excellent condition with a worn and illegible hallmark to the outer surface of the shank.

Reflections in photographs may detract from the true representation of this fine example of Art Deco jewellery/estate jewelry.

Diamond Quality

Feature Diamond

Colour I

Clarity P1

Cut Old European round

Content 2.35 carat

Dimensions 8.16mm x 8.02mm x 5.37mm

Supporting Diamonds

Colour (average grades) I

Clarity (average grades) P1

Cut Eight-cut

Content (total) 0.21 carat

Total Diamond Content

2.56 carats


Length of setting 1.83cm/0.72"

Width of setting 1.47cm/0.57"

Height of setting 6.65mm/0.26"

Ring Size

UK Size N 1/2

USA Size 6 3/4

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

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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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