A long round-section steel tool with a rosette-shaped point, worked by percussion and rotation to excavate holes and small depressions in stone.
Stampetta is a long steel tool of round section with a rosette-shaped point and a thickened striking end. It is driven by percussion while being rotated, producing holes or small depressions in stone.
Etymology
Italian workshop term.
Sculptor Notes
The combination of striking and rotation distributes the cutting action around the circumference of the hole rather than forcing a single chisel edge straight into the stone.
References
https://levocidelmarmo.sns.it/scheda_oggetti_relazione.php?denom=stampetta&id=44