





Vintage 9 kt signet ring with onyx
Determine ring size
Does this ring fit you? Our vintage rings are one of a kind – each one is unique and has a fixed size. So, it's important to check the ring size before ordering your new favorite. The table below shows which size corresponds to your finger. Not sure? Don't worry – we're happy to help.
| EU | Circumference (mm) |
Diameter (mm) |
US | UK | Inches |
|---|---|---|---|---|---|
| 14 | 44 | 13.7 | 2.9 | F | 0.554 |
| 14.5 | 46 | 14.6 | 3.55 | G 1/2 | 0.578 |
| 15 | 47 | 14.7 | 4.1 | H 1/2 | 0.594 |
| 15.5 | 49 | 15.5 | 4.75 | J | 0.61 |
| 16 | 50 | 15.9 | 5.3 | K | 0.626 |
| 16.5 | 52 | 16.6 | 5.95 | L 1/2 | 0.65 |
| 17 | 53 | 16.9 | 6.6 | M 1/2 | 0.666 |
| 17.5 | 55 | 17.5 | 7.2 | O | 0.69 |
| 18 | 56 | 17.8 | 7.8 | P | 0.706 |
| 18.5 | 58 | 18.3 | 8.4 | Q 1/2 | 0.722 |
| 19 | 59 | 18.6 | 9 | R | 0.738 |
| 19.5 | 61 | 19.4 | 9.6 | T | 0.77 |
| 20 | 62 | 19.5 | 10.2 | T 1/2 | 0.778 |
| 20.5 | 64 | 20.3 | 10.8 | V | 0.81 |
| 21 | 66 | 21.1 | 11.4 | X | 0.834 |
Not sure what size you are? Check out our ring size measurement page for a simple explanation and helpful tips.
Please note: Custom-made rings cannot be returned.

View this item in: Amsterdam

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Product information
Vintage signet ring with onyx is a striking piece in a 9 karat alloy, featuring a rectangular black onyx as a bold centerpiece. The smoothly polished onyx catches the light subtly and gains extra depth from the raised bezel setting with delicate bead detailing. The ornamented shoulders give the ring character and allow the dark sheen of the onyx to beautifully contrast with the elegant finish of the alloy. A timeless jewel that brings together strength, nostalgia and refinement. Not the right ring size? Our workshop can adjust it.
Graded by our GIA graduate gemologist
All of our jewelry is carefully assessed by our GIA Gemologist, Evelyn. This ensures you are guaranteed authenticity, quality, and craftsmanship.
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Shipping, warranty & returns
Certificate included with every piece.
14-day cooling-off period. Easy returns. Read the warranty & care guide.
About the gold purity
Solid recycled 9-carat gold. The purity falls below the Dutch legal minimum for a full hallmark, we'd rather be upfront about that. What you do get: genuinely solid recycled gold, real gemstones and a certificate.
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A unique piece with history
This exceptional vintage gem exudes the elegance of a bygone era. Carefully selected and expertly restored with respect for the original design. Authentic details have been preserved to fully express its character. An exclusive piece that will only know one new owner.



Trusted since 1973, by
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Since 1973, we have been carefully selecting timeless treasures.

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14-day cooling-off period
Take 14 days to decide at your leisure.
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