* Platinum hallmark
The 1000 hallmark: meaning, purity & value
Pure platinum fineness mark. Disambiguate from gold or silver '1000' by surrounding marks or color.
Published May 30, 2026
Quick facts
- Metal
- Platinum
- Purity
- 100.0%
- Fineness
- 1000/1000
- Common regions
- international
- Standard
- ISO 9202
Stamps that mean the same thing
This purity may be struck into jewelry as any of: 1000 / Pt1000 / 999. The mark differs by country and era, but the metal content is identical.
What 1000 tells you
Pure platinum fineness mark. Disambiguate from gold or silver '1000' by surrounding marks or color.
How to value it
The melt value of a 1000 piece is platinum spot price × 1.000 × weight (g). A buyer typically deducts 5–15% for assay, refining, and margin, so the cash offer lands just under that figure. Stones and complex settings are usually excluded from the metal weight.
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 1000 or an equivalent such as Pt1000.
- 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.
* Frequently asked
FAQ
- Q. Is 1000 the same as Pt1000?
- A. Yes. 1000, Pt1000, 999 all denote the same material — 100.0% platinum. Different markets and eras stamp it differently, but the purity is identical.
- Q. How much is 1000 worth?
- A. Its melt value is the platinum spot price × 1.000 × the weight in grams. Buyers then deduct roughly 5–15% for refining and margin, so a quoted buy-back price sits a little below that theoretical figure.
- Q. How do I confirm a 1000 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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