July 30, 2026

How to Read a Hallmark: Dating Antique Jewelry

By Sasha Tarasova

Filed under Jewelry Eras & HistoryHallmarks, Dating & Authentication

Based on Zhiva expertise, hallmarks can tell us a beautiful story about a jewel. However, their absence doesn't inherently mean that there is something wrong with the jewel. Turn an old ring over and look closely at the inside of the band. Those tiny stamps most people never notice are the piece telling you its own story — what it's made of, sometimes who made it, and, if you're lucky, the exact year and city it came from. Learning to read them is the closest thing collecting has to a superpower.

What a hallmark actually is

A hallmark is an official stamp certifying a piece's metal content, applied historically by an assay office that tested the metal. Alongside the official marks you'll often find a maker's mark and other symbols. Not every country hallmarked the same way, or at all — British jewelry is famously well marked, American pieces often carry only a metal stamp and a maker — so part of reading marks is knowing what to expect from where.

Where to look

Marks hide in the quiet places: the inside of a ring shank, the edge of a brooch, the clasp or a small tag on a necklace or bracelet, the case back of a watch. Use a jeweler's loupe (10x) and good light. Marks can be tiny, worn soft by a century of wear, or partly lost to an old resizing. Absence of a mark isn't proof of anything on its own — but a clear, correct set of marks is powerful evidence.

The marks you'll see most

Four kinds do most of the work. A fineness or standard mark tells you the metal and purity — 750 for 18k gold, 585 for 14k, 925 for sterling silver, marks for platinum. A maker's or sponsor's mark, usually initials, identifies who made or submitted the piece. An assay office mark (in systems that used them) shows the city that tested it. And a date letter — the collector's favorite — can pin some pieces to a single year, since the letter's font and shield shape changed annually.

How the marks date a piece

Read together, the marks narrow things down fast. The style of the numerals, the shape of the shield around a date letter, the specific purity standards in use, whether platinum is marked at all — each detail brackets a period. A purity standard that only existed after a certain year, or a maker whose working dates are known, can confirm or quietly demolish a seller's claim about age. Once the marks point to a period, our guides to Georgian jewelry and Edwardian jewelry show what a genuine piece from it should look like.

A word of caution

Marks can be faked, transposed from a broken piece, or simply misread. They're one strong piece of evidence, not the whole case — they should agree with the style, construction, and wear of the piece. When the marks say one thing and the piece says another, trust the disagreement and dig further. Certain countries, like the U.S. don't have a hallmarking system regulated federally, which means it truly up to the jeweler, what to engrave or stamp. Some crafters choose to leave the shank blank.

This is a large part of what verification means at ZHIVA: not taking a piece's word for it, but reading everything it's willing to tell you — and confirming the story holds. It's the same rigor behind our private sourcing service and every bespoke commission we take on.

— Sasha, ZHIVA