What “self-collected” means on a mineral label
Self-collected asserts that a named person found the specimen at the named place. Four questions test it, and one of them fails most labels written after 2000.
Self-collected asserts that a named person dug or found the specimen themselves at the locality on the label. It is the only provenance claim whose evidence is a person rather than a paper trail, which makes it the strongest locality statement available for recent material and the weakest once the collector is gone.
In short
- It is a claim about the collector, not about the specimen. Every other provenance note — ex coll., a dealer's label, an auction lot number — points at a document or a transaction. Self-collected points at a person, and it is worth exactly what that person's name is worth.
- An unattributed “self-collected” is worth nothing. If the label does not say who, the claim cannot be tested, and a locality with no evidence behind it is a locality with no evidence behind it. This is the commonest failure by a wide margin.
- At its best it is the strongest locality evidence there is. A named living collector, a date, a specific working and a photograph or field note beats any dealer label, because there is no intermediary who could have got it wrong.
- It does not mean the specimen was collected legally, and the two questions are separate. Being lawfully on land is not the same as being entitled to remove material from it — access rights and collecting rights are different things.
- Record it as written and test it separately. Never upgrade a bare “self-collected” into a confident locality in your catalogue; record the claim, record who made it, and record what you were able to check.
| What the label says | Evidence available | Weight | How to record it |
|---|---|---|---|
| Named collector, living, dated, specific working | The collector can be asked | Highest available for recent material | Locality as stated; note the collector and date |
| Named collector, deceased, with field notes or photographs | Contemporary documentation | High | Locality as stated; cite the documentation |
| Named collector, deceased, no documentation | Reputation only | Moderate, and depends on the name | Locality as stated, attributed, unverified |
| “Self-collected” with no name | None | None | Record the phrase; do not record the locality as established |
| Self-collected at a site closed before the stated date | Contradicted by the date | Negative — doubt the whole label | Flag the conflict in the notes and leave it unresolved |
| Self-collected, species not known from that locality | Contradicted by the mineralogy | Negative | Record the conflict; the species or the locality is wrong |
The four questions that test the claim
Apply these to any self-collected label before you accept it. They take a minute and they sort most cases.
1. Who? A name, or the claim fails immediately. “Self-collected” written by an unknown hand on an unattributed card is a sentence with no subject. If the specimen has come through a dealer who knows the collector, the dealer can supply the name; if nobody can, record the phrase and stop there.
2. When? A date, even to the year. The date is what makes the claim checkable, because it can be set against the working history of the locality. A specimen self-collected from a mine in 1987 when the mine was backfilled in 1978 has a problem, and finding that problem is the entire value of asking for the date. Dumps and tips complicate this usefully rather than fatally: material can legitimately be collected from a tip decades after the workings closed, and a good label says so.
3. Where, exactly? “Cornwall” is not a collecting locality. A self-collected label should name a mine, a quarry, a level, a dump or a named exposure, because a person who was actually there knows where they were. Vagueness in the one field the collector could not have been vague about is the strongest signal that the claim is second-hand. Our page on what a type locality is covers why locality precision matters mineralogically.
4. Is the collector reachable, or documented? This is what separates a high-weight label from a moderate one. A living collector can be asked. A deceased one may have left field notebooks, a catalogue or photographs, and those travel with a good collection. A name with nothing behind it is a reputation claim, and reputations vary.
Why it is the strongest and the weakest claim at the same time
The odd thing about self-collected material is that its value as evidence collapses in a way other provenance does not.
While the collector is alive, it is the best evidence available. There is no chain of custody to go wrong, no dealer who mixed two flats, no auction lot that was catalogued from a photograph. One person, one site, one day. For recent material from a working quarry, a self-collected specimen with a named collector is a better-documented object than almost anything you can buy.
Once the collector is gone, the claim reverts to the label. And a label is a piece of card. It carries no more weight than any other unverifiable statement unless something else supports it — a notebook, a photograph, a published account, a second specimen from the same trip in a documented collection.
This is the opposite of how ex coll. provenance behaves. An ex coll. attribution to a known historical collection generally gains weight over time, because the collection gets written about, catalogued and studied, and the attribution becomes checkable against published records. What ex coll. means on a label covers that side.
The practical consequence: if you self-collect, document it now. A date, a grid reference or a named working, a photograph of the site, and your own name on the label. It costs five minutes and it is the difference between a specimen that carries evidence in forty years and one that carries an assertion. If you are cataloguing someone else's self-collected material, do the same in reverse: record what the label claims and what supports it, as two different fields, using the three-state convention on how to label and catalogue a collection.
Self-collected is not the same as legally collected
These are two separate questions and a label answers only the first. A specimen can be genuinely self-collected and still have been taken from somewhere the collector had no right to take it.
Being lawfully present is not the same as being entitled to remove material. The right of access over open country under the Countryside and Rights of Way Act 2000 is a right to be on the land. Schedule 2 to that Act sets out the restrictions on people exercising it, and the list includes an express prohibition on having a metal detector and on removing or damaging plants — the right does not extend to taking away what is in the ground, and land in access status is frequently also designated for other reasons.
Sites of Special Scientific Interest are the case to know. Many of the best British mineral localities are SSSIs, and damaging their features is an offence. Our page on whether it is legal to collect minerals in the UK covers the position properly, and it is the page to read before a field trip rather than this one.
What it means for a label: a self-collected claim that names a site where collecting was clearly not permitted at the stated date is a label that raises a question. That question is not necessarily fatal — permissions are given, sites change status, and a collector may have had access nobody else did — but it belongs in the notes rather than being quietly ignored.
This is not legal advice. If a specific specimen's status matters, the landowner, the relevant statutory body and, where it is serious, a solicitor are the right sources, not a dealer.
What to write, if you are the one collecting
A field label written at the site, in the field, beats anything reconstructed later. Five fields, and it takes less time than the walk back to the car.
Your name. In full. “Self-collected” with no name is the failure mode described above, and you are the only person who can prevent it for your own material.
The date. Full date, not just the year. It is what makes the claim checkable later.
The locality, as specifically as you can state it truthfully. Mine or quarry name, the working or level if you know it, whether it was in situ or from a dump or tip, and the county and country. If you took it from a tip, say so — that is a fact about the specimen, it is not a defect, and concealing it is what turns a good label into a misleading one.
What the permission was. Who gave it, if anyone. A sentence is enough.
Anything you noticed. The associated species, the depth, the weather, whether the vein was oxidised. This is the field that is worthless the day you write it and priceless in thirty years, and it is the one everybody skips.
Photograph the site and the specimen in place if you can, and keep the photographs with the catalogue record rather than on a phone that will be replaced. Then, when it goes into the collection, the label travels with the specimen and never leaves it — the one rule with no exceptions anywhere on this site. Our collecting guides cover the rest of the record-keeping, and the material we are looking for, self-collected or otherwise, is listed on the wanted list.