The lapidation process and the polishing process differ in two main aspects:

Polishing is capable of reducing the roughness from relatively high values ​​to very low values, unlike polishing, which must already receive the part to be worked with a relatively low roughness, but which has a higher surface quality.

The polishing can give the piece the shape of the tool used, while polishing has the purpose of only improving the surface quality, with the removal of material in the background.

A calibrated gem is one that is cut to the industrial scale, so it has the same dimension so that it can be set in fixed models of jewelry.