Abstract: The setting support (1) for a stone (21), of the general type produced from metal and comprising an axial bore (16) which is intended for receiving the stone (2) and the front end part (17) of which forms a seat for the collet (10), the necessary plurality of separate setting claws (19) intended to assume position on the crown (9), and at least one facet (20) performing the function of increasing the apparent dimension and brilliance of the stone (2), wherein a mirror facet (20) is arranged along a chord of the setting support (1), in such a way that this mirror facet (20) can extend in a direction at least substantially parallel to one or more adjacent facets (11, 12, 13) of the stone (2), especially of the crown (9), the effect of this arrangement being to ensure the function of the facet (20) of the setting support (1) effectively.