1. Method of making jewelry of gold, platinum or their alloys, which comprises the steps of preparing a rectangular sheet of conventional milanese; adding coiled wires of gradually decreasing length on either side of this sheet in order to obtain a polygonal blank, soldering the ends of each coiled wire to the last coil of the adjacent coiled wire, placing the resulting blank in a shaping press comprising a plurality of convergent movable jaws of which the minimum inner overall contour corresponds to that of the element to be obtained after operating said press, subsequently causing said jaws to converge towards one another in order to contract the blank disposed therebetween to the desired contour, coating one face of the blank with a thin layer of molding wax, electroplating a copper deposit on the other face of said blank, annealing and scouring the element thus obtained, hammering the wax-coated face of the element while held in its new shape with a cylindrical punch having a flat, granitelike end face, by using successive small passes in order to crush the wires of the blank to fill up all the gaps thereof and obtain a solid surface, finishing the element by another hammering operation using a cylindrical punch having a flat and polished end face, re-annealing and re-scouring the element, coating the hammered surface thereof with wax, re-plating the non-hammered surface with copper, and while holding the element in and against a die formed with the counterpart of the desired pattern, again hammering the other face with a flat-ended cylindrical punch, and removing the copper by etching with acid.