Rules
US Silver Hallmarking Laws: When Can You Legally Call It Sterling?
US silver hallmarking laws rest on the FTC Jewelry Guides, not a federal assay office. Learn what a compliant stamp carries and who enforces it.
What to take away
- There is no federal assay office in the United States. No government body tests your silver and stamps it before sale.
- The legal threshold for calling a piece sterling comes from 15 U.S.C. § 294 and the FTC Guides for the Jewelry, Precious Metals, and Pewter Industries at 16 CFR Part 23.
- A compliant marking carries a quality mark such as sterling or 925 and, for most domestic makers, a trademark or maker's mark.
- Enforcement is largely state-level, through unfair and deceptive trade practices statutes, plus FTC action against sellers who misdescribe goods in commerce.
- A misdescribed silver piece can bring refund demands, state consumer protection claims and civil penalties, so the stamp is a legal statement, not decoration.
Who has jurisdiction over silver marking
No US mint, assay office or federal inspector examines a piece of jewelry before it reaches a buyer. That single fact shapes everything else. The Federal Trade Commission writes the trade rules, and the states police the storefront.
The core federal text is 16 CFR Part 23, the Guides for the Jewelry, Precious Metals, and Pewter Industries. It tells sellers how to describe silver quality without deceiving buyers. Read the regulation directly rather than a summary.
The statutory definition sits in 15 U.S.C. § 294, which sets the fineness standard for the word sterling. The Guides then explain how that word may be applied in advertising and on the object itself.
State attorneys general enforce their own consumer protection laws. A maker in one state who ships to another can face the buyer's state rules as well as their own.
The fineness threshold and what each mark means
Sterling silver is an alloy of 925 parts silver per 1,000 by weight, with the balance usually copper. The sterling silver reference covers the alloy and how the number is written.
| Mark on the piece | What it claims | Typical legal status in the US |
|---|---|---|
| Sterling, Sterling Silver, 925 | 925 parts per 1,000 silver | Acceptable quality mark when the alloy meets it |
| Coin silver | 900 parts per 1,000 silver | Allowed only if the alloy actually meets 900 |
| Fine silver, 999 | 999 parts per 1,000 silver | Accurate description of a different alloy |
| Silver, Solid Silver | No stated fineness | Risky and often treated as deceptive |
The word silver alone, with no fineness and no qualifier, is the classic problem. A plated item marked simply silver invites a misdescription claim. Silver plate is a base metal with a silver layer, and the silver plate explainer sets out that difference clearly.
What a compliant marking carries
The Guides require a quality mark to be accurate, and they expect the maker to be identifiable. A trademark or maker's mark ties the claim to a responsible party. Without it, a buyer cannot trace who made the claim.
- Quality mark states fineness, such as 925 or sterling
- Maker's mark or trademark appears on the piece
- Any country of origin statement is accurate
- Advertising matches the stamp on the object
A piece stamped 925 that tests at 800 is not a labelling slip. It is a false statement about the goods, and the seller carries the burden of explaining it. The silver alloys guide walks through fineness, composition and the tests that confirm them.
The stamp is a claim of fact. If the alloy does not meet it, the seller has misdescribed the goods in commerce.
What happens if you skip it
The concrete consequence is a deceptive trade practices claim. A buyer who paid for sterling and received plated metal can demand a refund, file a state consumer complaint, and in some states pursue statutory damages or fees.
The FTC can also act against a seller whose advertising misstates silver content. Remedies include injunctions and redress to buyers. State attorneys general bring parallel cases under their own statutes.
For a small maker, the practical damage is faster and quieter. A single retail partner that pulls stock after an assay test can end a wholesale account. Repair shops and pawn brokers test incoming silver, and a failed test travels through trade networks quickly.
Documentation helps. Keep alloy invoices, melt lot numbers and any assay certificates. If a question arises, records show what went into the piece. The unknown silver-colored metal method is a useful habit for stock you did not refine yourself.
Where the rules do not reach
Federal law does not require any stamp at all. An unstamped piece of sterling is legal to sell if it is described accurately in words. The requirement attaches to the claim, not to the object.
This is why imported flatware sometimes arrives unmarked. The seller can describe it as sterling in the listing without stamping the metal.
Antique and vintage pieces follow a different path. Old marks may reference defunct assay systems, and the silver hallmark article explains how those marks were applied abroad. A US seller still has to describe such a piece honestly.
Common questions
Do I need a federal license to stamp silver sterling? No. There is no federal assay office or stamping license. You must simply meet the fineness and describe the piece truthfully.
Is 925 the same as sterling in US law? Yes, when the alloy meets 925 parts per 1,000 silver. The number and the word carry the same fineness claim under the Guides.
Can I stamp a piece I did not make? Only if you can stand behind the fineness. Adding your mark makes you the responsible party for the claim on that object.
What if my silver tests slightly under 925? Do not stamp it sterling. Describe the actual fineness or sell it as an alloy without a sterling claim.