| Bruting is the process of grinding the blank against another diamond to reduce it to the required size. |
| The stone is next mounted on a lathe and, using a second diamond, the points of the crystal are ground away to form a round girdle, a process known as bruting. |
| This operation, by which the shape and position of the facets are roughly marked out, is known as bruting, rubbing, or graying the stone. |
