An Italian toothed stone-carving chisel, closely related to the gradina, used for shaping and finishing sculpture.
Gradino is a toothed chisel used in sculpture. Le voci del marmo lists it among tools used for smodellatura, while a Versilia marble-industry publication describes it as a classic iron tool used in sculpture finishing, made in different forms and sizes.
Historical technical sources sometimes treat gradino as a variant or closely related form of gradina.
Etymology
Italian gradino; workshop and historical usage closely related to gradina.
Sculptor Notes
Do not assume every Italian workshop uses gradino and gradina identically. Tool names can shift by period, region, tooth count, and shop practice; preserving the terms separately lets the Lexicon document those distinctions rather than erase them.
References
https://levocidelmarmo.sns.it/lista_video.php; https://cosmave.it/wp-content/uploads/2022/10/VP131_Ottobre_2022.pdf; https://www.palazzospinelli.org/argomed/scheda-argomed-ita.asp?ID=769