When Not to Clean a Fossil

Dirt, matrix, coatings, and old repairs may contain evidence that aggressive cleaning destroys.

The practical rule

• Pause when the matrix is flaky, pyritic, clay-rich, or water-sensitive.
• Do not chase a brighter color at the cost of surface detail.
• Document the specimen before every intervention.

What to record

Preserve the original seller description, photographs, invoice, claimed locality, formation, age, dimensions, and every statement about preparation or restoration. Add your own interpretation as a dated note rather than replacing the original record.

What makes a stronger collection

A coherent collection is not necessarily the largest or most expensive. It contains specimens that can be compared, explained, and traced. Documentation turns a decorative object into a durable teaching and research asset.

Next step

Choose one specimen and improve its record today: photograph the reverse, measure it, transcribe the label, save the invoice, or document restoration boundaries.