* assay-mark hallmark
The ROSE hallmark: meaning, purity & value
British assay office mark: Tudor rose indicates Sheffield Assay Office (established 1773 by the same Act as Birmingham, traded the crown mark on gold for the rose only in 1975). Sheffield historically specialized in silver.
Published May 30, 2026
Quick facts
- Metal
- assay-mark
- Common regions
- UK
Stamps that mean the same thing
This purity may be struck into jewelry as any of: ROSE / Sheffield Rose / TUDOR ROSE. The mark differs by country and era, but the metal content is identical.
What ROSE tells you
British assay office mark: Tudor rose indicates Sheffield Assay Office (established 1773 by the same Act as Birmingham, traded the crown mark on gold for the rose only in 1975). Sheffield historically specialized in silver.
How to check it yourself
- Examine the stamp under a 10× loupe — genuine marks are crisp and evenly struck, not doubled or smeared.
- Confirm the mark reads ROSE or an equivalent such as Sheffield Rose.
- Photograph it in the Jewelry Identifier app to read the metal, hallmark, and any gemstones from the image.
- For a binding result, have an assay office or gemological lab run an XRF purity test.
Sources
- Sheffield Assay Office records
* Frequently asked
FAQ
- Q. Is ROSE the same as Sheffield Rose?
- A. Yes. ROSE, Sheffield Rose, TUDOR ROSE all denote the same material — assay-mark. Different markets and eras stamp it differently, but the purity is identical.
- Q. How do I confirm a ROSE stamp is genuine?
- A. Look at the mark under 10× magnification for crisp, even strikes, cross-check the weight-to-volume ratio against the expected density, scan it with the Jewelry Identifier app, and — when it matters — have an XRF test done by an assay office or gemological lab.
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