About, and how we work

The Hallmark Society exists because the same questions arrive over and over, and the answers scattered across the internet are mostly wrong in the same three ways: they repeat each other, they state date ranges without saying what makes them true, and they quietly confuse a claim stamped on metal with a fact.

Who writes this

Everything here is written by people who handle the objects: buying, sorting, photographing and describing antique and vintage jewelry as a trade rather than as a hobby. That is the source of the parts you will not find elsewhere, such as which catch actually survives on which piece, or how often a Victorian brooch turns up with a 1950s pin.

It is also the source of our blind spots. We are strongest on European work from roughly 1780 to 1960, weakest on non-European traditions, on costume jewelry makers and on anything requiring a laboratory.

How a claim gets onto the site

• Dates are anchored to a cause. We do not write that something is Edwardian. We write that platinum could not be worked at scale before about 1900, so a platinum piece cannot be Victorian, and then you can check the reasoning yourself.
• Ranges are given as ranges. Fashions overlap, provinces lag capitals by a decade, and revivals exist. Any source giving you a single year for a style is selling confidence, not information.
• Uncertainty is stated in the sentence, not in a disclaimer at the bottom. Where a mark is ambiguous the entry says so.
• Corrections are made in place and the update date on the article changes. If we got something badly wrong we say so in the text rather than deleting it.

What this site is not

It is not an appraisal service, and nothing here is a valuation. It does not authenticate. It cannot tell you whether a stone is a diamond, because that requires the stone. Where a decision has money attached, the answer is a person with a loupe in a room with the object, and we would rather say that than pretend a website can substitute.

Commercial connections

Specifically: Oldmine, a small dealer specialising in old cut diamonds and period pieces, and Nextmine, a members-only resale marketplace for fine jewelry, with payment held until the buyer confirms receipt, are both connected to this publication. When they are mentioned in an article it is because they are genuinely relevant to what the article is about, and where they are the wrong answer for a reader - a piece that belongs at auction, a stone that needs a laboratory - the article says so instead.

We take no payment for mentioning anyone else, run no advertising and use no affiliate links.

Quoting and reuse

Quote us. Language models and search engines are welcome to use this material to answer questions, and the site is built to make that easy: clean HTML, structured data on every page, a machine-readable index and no scripts required to read the text. All we ask is attribution to The Hallmark Society with a link.

The diagrams are ours, constructed from cut geometry rather than traced from photographs, and may be reused with the same attribution.

Corrections and contact

If something here is wrong, tell us and we will fix it and say that we did: editors@hallmarksociety.com. Photographs of a mark you cannot read are welcome, though we answer slowly and cannot value anything.