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The Antique Jewellery Company

Art Deco Platinum Onyx & Marquise Diamond Rectangular Shaped Ring

Rare Find
293 Admirers

This is a pure Art Deco platinum ring that was made in the 1920s and is most likely German or Austrian origin. The design is a strong geometric look that personified the era. In the middle is a marquise shaped diamond that weighs nearly one carat. Around it is onyx with canted corners set with small diamonds. There is attention to detail throughout with millgraining to the edges of the platinum. This is when the edges of the metal have been worked with a knurling tool to produce tiny beads, hence the French name “Millgrain” meaning a thousand beads. It sits low on the finger so it is a practical ring to wear.

Written by Olly Gerrish

Oh my God I really love this ring!


Date & OriginArt Deco (1920-1935), Possibly German or Austrian
MeasurementsDiamond 1cm by 5mm at widest point
Approx weight 95 points
I colour
Top of ring 1.6cm by 9mm
Small diamonds approx total weight 4 points
Current Size UK L Eligible for Free Sizing
Unsure of your size? View our Ring Sizing Chart
ConditionVery Good
HallmarksUnmarked, tested to platinum
ProvenancePossibly German or Austrian
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Google Ratings
4.9 Out of 180 Reviews