What to look for when buying minerals online
Read the photographs before the description, and check the locality on the label. A UK dealer owes you 14 days to cancel; a private seller usually does not.
Read the photographs before the description. A specimen shown from one angle, under one light, with no view of the reverse and no matrix, is a listing built around a problem. Check the locality on the label. A UK dealer owes a consumer 14 days from delivery to cancel; a private seller usually does not.
In short
- Count the photographs and count the angles. A specimen photographed once, from its best side, under flattering light, with no reverse and no scale, is a listing designed around a problem. Good dealers photograph damage.
- Ask for a raking-light shot. A light held nearly parallel to the surface throws every repair line, cleavage plane, bruise and glue seam into relief. Asking for one is normal and a straight answer to the request is itself information.
- The 14-day cancellation right applies to traders, not to everyone. Under the Consumer Contracts Regulations 2013 the cancellation period for a UK distance sale ends 14 days after the goods come into your physical possession — but that is a consumer buying from a trader.
- Private sales and public auctions generally fall outside those rules, which is a large share of where minerals actually change hands. Know which kind of transaction you are in before you bid.
- Vague locality is the commonest quiet defect. “Cornwall, UK” where a mine name should be, or “Morocco” on a specimen whose value depends on being from Mibladen, is a real reduction in what you are buying.
| What the listing does | What it usually means | What to ask |
|---|---|---|
| One photograph, one angle, no reverse | The reverse has a contact, a saw cut, a repair or damage | Ask for the back, and for both sides in the same light |
| Heavy directional lighting, dark background, wet-look sheen | The specimen has been photographed to flatter. Sometimes it is genuinely fine; sometimes the lighting is doing the work | Ask for a flat, diffuse, daylight-balanced shot |
| No scale object or dimensions | Either carelessness or a very small specimen presented large | Ask for dimensions in millimetres, and a shot with a scale in frame |
| Locality given as a country or county only | The mine is unknown, or is less impressive than the region | Ask what the label says verbatim, and whether an older label exists |
| "Repaired" or "restored" not mentioned at all | Often fine. Sometimes it means nobody looked | Ask directly: has it been repaired, glued, filled or reconstructed? |
| "As found", "natural", "untreated" used repeatedly | Reassurance offered without being asked for | Ask what was done to it — cleaning counts, and honest dealers say so |
| Species name with no qualifier on a hard-to-determine species | An assumption presented as a determination | Ask whether it has been analysed, and record the answer either way |
| Price far below comparable material | Condition, locality doubt, or a species misidentification | Assume the difference is real and find out where it is |
Read the photographs first, and read them as evidence
The description is what the seller chose to tell you. The photographs are what the seller could not avoid showing you. On a mineral specimen, the second is far more informative than the first, and reading them in that order changes what you notice.
Work through a fixed sequence. How many distinct angles are there? A specimen shown from one side has five other sides. Is the reverse shown? The back is where contacts, saw cuts, repairs and old glue live, and its absence is the single most reliable signal in this list. Is there a scale? Not a stated dimension — an object in frame, or a shot against a rule. Is the lighting consistent between shots? A specimen that looks gemmy in one photograph and dull in another is telling you which one is the honest exposure.
And what is cropped? A tight crop that cuts through the matrix at the edge of frame is usually hiding the edge of the matrix.
The single most useful request you can make is for a raking-light photograph: the light held almost parallel to the surface rather than pointing at it. Raking light throws texture into relief, and repair lines, cleavage planes, bruised crystal tips and glue seams that vanish under flat light all become obvious. Our page on telling whether a specimen has been repaired sets out what to look for once you have the shot.
The rule: ask for the photograph you would take if you were trying to find the fault. A dealer who supplies it promptly has told you a great deal; one who supplies a better version of the original angle has told you something too.
Which rules actually protect you, and when they do not
This is the part most buying guides skip, and it is the part that decides what happens when something arrives wrong.
If you are a consumer in the UK buying at a distance from a trader, the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 give you a right to cancel. Regulation 29 provides that the consumer may cancel a distance or off-premises contract at any time in the cancellation period without giving any reason, and regulation 30 provides that for a sales contract the cancellation period ends 14 days after the day on which the goods come into the physical possession of the consumer. You do not need the specimen to be faulty. You do not need to justify it.
That right depends entirely on the other party being a trader and you being a consumer. A great deal of mineral buying is neither. Buying from another collector on a forum, at a club night, or through a private classified is a private sale, and the cancellation regime does not apply. Public auctions are generally treated differently again. And buying from a dealer outside the UK puts you under a different jurisdiction, whatever the platform's own policy says.
Platform policies are a separate thing from law and are often more generous in practice and less certain in principle. They are a commercial promise by an intermediary, they change, and they run on the platform's timetable.
The rule: establish which of the three you are in — trader, private seller, or auction — before you commit, because it determines whether “I have changed my mind” is a right or a request. This is not legal advice and specific circumstances vary; if a substantial sum is involved and something has gone wrong, take proper advice. What matters here is that the question is asked before the money moves rather than after.
Locality, labels and the things sellers leave out
The quiet defect in online mineral buying is not damage, which at least shows in a photograph. It is loss of information, which does not.
A specimen's locality is a substantial part of what it is. “Fluorite, Weardale” is a much weaker statement than “Fluorite, Rogerley Mine, Weardale”, and the gap between them is not pedantry — on many species the mine-level attribution is most of the value, because habit, colour and association differ between workings a mile apart. When a listing gives a county or a country where a mine should be, that is usually because the mine is not known, and once it is lost it does not come back.
So the questions worth asking are about the paperwork rather than the stone. What does the label say, word for word? Are there older labels, and will they come with it? Where did the seller get it? None of these is an awkward question and all of them are routine between people who handle this material. Our guide to what the abbreviations on a mineral label mean covers how to weigh the answers, and buying old collection material covers why old paperwork is worth insisting on.
Two more omissions worth naming. Species determination on hard cases: the copper sulphides, the turquoise group, the zeolite series and the lead apatites all include pairs that cannot be separated by eye, and a confident species name without an analysis is an assumption. See pyromorphite versus mimetite for how that plays out. And treatment: cleaning, acid preparation and consolidation are normal and acceptable, and undisclosed they are not. Ask what was done.
A buying sequence that works, and the alternative to searching
Put together, the process is short and it goes in this order.
One. Read the photographs before the description, using the checks above. Two. Establish whether the seller is a trader, a private seller or an auction, because that sets your position if it goes wrong. Three. Ask three questions: for a raking-light shot of the front and the reverse, for the label verbatim, and whether it has been repaired, treated or cleaned. Four. Decide on the answers, including on how the answers were given. Five. Photograph the specimen on arrival before unpacking it fully, which settles any argument about transit damage.
What that sequence cannot do is find the specimen in the first place. Searching listings works well for species that are widely offered and badly for everything else — and “everything else” includes most of the material serious collectors actually want: a particular mine, a particular habit, an old label, an analysed example, a size that suits a specific gap in a suite.
The alternative is to work in the other direction and let the specimen find you. That is what our wanted list is: you describe the species, locality, size range and condition you are after, and we tell you when something matching turns up. There is no catalogue here and no stock, so it costs nothing and commits nothing, and it works precisely on the material that searching handles worst.
It is worth being honest about the trade-off. Searching listings is immediate and you see everything available today; a wanted list is slow and may return nothing for months. If you want a specimen this week, search. If you want the right specimen and are prepared to wait for it, the wait is what buys you the quality — and our page on where to buy mineral specimens compares the channels honestly, including the ones we are not.