Independently researched Practical Guide
How to Identify Metal Detecting Finds
Identification starts before cleaning: record the findspot where lawful, photograph scale and both faces, note material and construction, then compare diagnostic features with authoritative databases or specialists.
Bottom line
Preserve context before chasing an object name
Do not strip corrosion to reveal details. Record dimensions, weight, magnetism, edge, seams, attachment points and visible marks. Use regional museum/PAS databases and report potentially significant finds under the applicable law.
Field guide
Starting points and hard limits
| Situation | Baseline | Action | Caution |
|---|---|---|---|
| Coin-like disc | Both faces, edge, diameter, weight and axis | Compare regional coin databases | Do not acid-clean inscriptions |
| Buckle/fitting | Frame, pin, plate, rivets and decoration | Search typology by construction | Fragments are easily misnamed |
| Lead object | Shape, holes, stamps and context | Handle/wash hands; specialist check | Lead color is not dating evidence |
| Possible archaeology | Leave context intact where required | Notify authority/landowner | Ownership/reporting laws vary |
Method
Use a controlled workflow
Document untouched
Photograph in situ and after lifting with scale, both faces and edges.
Describe construction
Measure size/weight and note casting seams, holes, fasteners and decoration.
Narrow material/date
Use non-destructive clues and regional typologies—not color alone.
Verify and report
Consult museum/PAS staff or qualified specialists when significance is plausible.
Decision analysis
What actually changes the result
Context is identification data. Exact location, depth, association and soil can distinguish an isolated modern loss from an archaeological assemblage.
Color does not reliably identify metal. Copper alloys can be green, lead gray, silver black and plated objects misleading; destructive scratch/acid tests can erase evidence.
Authoritative comparison beats image-search guessing. The Portable Antiquities Scheme database contains over 1.8 million recorded objects and provides regional typologies and staff support.
FAQ
Seven questions specific to this guide
What should I record before cleaning a find?
Photographs, scale, location/context where lawful, depth, dimensions, weight, both faces, edge and visible construction.
Can color identify the metal?
No. Corrosion, soil and plating change appearance, so color is only one weak clue.
Should I remove corrosion to read marks?
Not on an uncertain or significant object; cleaning can destroy inscriptions, plating and residues.
Where can British archaeological finds be identified?
The Portable Antiquities Scheme database, guides and local Finds Liaison Officers are authoritative starting points.
How can a coin-like token be distinguished from a coin?
Record edge, thickness, weight, legends, portrait/symbol layout and compare with regional references.
Does a magnet prove an object is iron?
Strong attraction supports ferrous material, but plated/composite objects and some alloys complicate the result.
When should a find be reported?
Whenever local law or land agreement requires it, or archaeological/treasure significance is plausible.
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Use evidence and leave no damage
Record the conditions, preserve context and restore every permitted recovery.
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