Preparation of fossils using a pneumatic micro-hammer, a pencil-sized tool that works like a mini jackhammer. It blows up rock shards of a few millimeters. If the nature of the stone lends itself to it, the interface between the fossil and the rock that hosts it forms a mechanical heterogeneity. The shards jump preferentially, which really makes it possible to clear the surface of the fossil while preserving it. - Blouet brothers collection