CuriSnap marks and hallmarks field guide
Platinum marks: 950, PLAT and PT explained
In current FTC consumer guidance, unqualified “Platinum” describes an item that is at least 95% pure platinum. Marks such as 850 Plat. or 900 Pt. state the pure-platinum content in parts per thousand. Read any additional alloy disclosure and test the actual item when composition matters.
What does 950 Pt mean?
950 Pt or 950 Plat states 950 parts platinum per thousand under the applicable system. It is a content claim, not a maker or date.
How should platinum marks be photographed?
Photograph the entire object first, then the complete mark group, then a sharp close-up from a second light angle. Record dimensions separately. Preserve the original file; do not polish, scrape or retouch a mark to make it easier to read.
| Evidence | What to record | Research limit |
|---|---|---|
| Marking | FTC consumer meaning | Still verify |
| Platinum | At least 95% platinum | Actual item and seller claim |
| 950 Pt / Plat | 950 parts platinum per thousand | Other marks and construction |
| 900 Pt / Plat | 900 parts platinum per thousand | Remaining alloy |
| 850 Pt / Plat | 850 parts platinum per thousand | Remaining alloy and disclosure |
What do 850 Plat and 900 Pt mean?
FTC guidance describes these as 85% and 90% platinum, with the balance made from other metals. Read the full marking.
What can a platinum mark prove?
A photographed mark is evidence to research, not a certificate. A mark alone cannot prove authenticity, exact age, maker attribution, precious-metal content, condition or market value. Compare the complete object with documented records and obtain an in-person test when the decision depends on material or authenticity.
What should a buyer request?
Ask for weight, every mark, seller disclosures, return terms and the testing method if composition is material to the price.
Primary references
- U.S. Federal Trade Commission: Advertising platinum jewelry
- U.S. Federal Trade Commission: Buying platinum, gold, and silver jewelry
References support the stated systems and documented examples. They do not endorse CuriSnap or authenticate a reader’s object.
Frequently asked questions
Can platinum marks authenticate an object?
No. A photograph and reference comparison can narrow a research question, but authentication and material testing require appropriate examination of the object.
What photograph should I take first?
Take one sharp photograph of the entire object, followed by the complete mark group and a close-up from a second light angle.