Abstract: A method for producing precious or semi-precious stones comprising the following steps is described: cutting and polishing of a rough crystal (1) so as to obtain a polyhedron of cut crystal (2); gluing together of at least four polyhedrons (2) of cut crystal so as to obtain a larger polyhedron (4); and cutting of the polyhedron (4) of glued crystals so as to obtain a finished precious or semi-precious stone (6).