| 摘要 |
<p>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).</p> |
