Abstract: Procedure for making jewellery items such as ropes or chains, which provides for: a step for making a wire at full thickness with an external layer made of precious metal seamed on a support core made of non-precious metal; a coating step of the external layer through winding of adjacent coils of a continuous tape made of precious metal; a diamond-pattern engraving coating step; a step for shaping the wire wound with a diamond-pattern engraved coating, during which the wire is permanently deformed while the coating is deformed less maintaining a stable set of incisions produced by the diamond-pattern engraving operation with an intact shape in a manner to reflect the light in an ideal manner; a step for emptying the core made of non-precious metal through baths in acid solutions.

Abstract: Alloy for ornamental articles comprising a non-precious metal base and one or more precious metal alloying elements. The latter are present in an alloy, in combination or individually, with a content by weight chosen from the range of between 0.1/1000 and 100/1000. The content by weight produces concentrations of the precious metal alloying elements mainly in phase separation structures distributed around the particles of the crystal structure of the base. This particular nanometric distribution of the precious metal alloying elements imparts to the alloy a shininess which is comparable to that of precious metal alloys.

Abstract: Display device for ornamental objects made up of chains with various aesthetic qualities, which comprises a framework, adapted to support a support base in a slanted manner for the display of at least one ornamental object. The support base overlaps a portion concealed in a container compartment provided with a plurality of parallel seats suitable to accommodate a corresponding plurality of ornamental objects. The compartment keeps a visible portion not overlapped by the support base to display the plurality of ornamental objects made up of various chains.

Abstract: Device for adjusting ornamental chains, which comprises a hollow containing body provided with at least one pair of diametrically opposite holes and an elastically yielding sleeve arranged inside the hollow containing body and provided with a through-hole arranged aligned with respect to this pair of opposite holes so as to define a channel for receiving the ornamental chain. The tubular sleeve is made of polyurethane reinforced with anti-bacterial additives and is kept compressed inside the hollow containing body.

Abstract: Article of jewelry such as a chain for bracelets, necklaces or the like, in particular of the double-face type, comprising an inner core (2) made of flexible material, preferably precious metal, and a continuous winding obtained with a multi-layer strip (3) wrapped around so as to cover the outer surface of the core (2). The outer layer (3a) may undergo diamond-machining operations so as to leave visible an underlying layer (3b, 3c) with the desired form and dimensions.

Abstract: A method of decorating items of jewelry. The method includes the steps of bringing about a translational relative movement between the item and a cutting tool along the longitudinal axis of the item, and driving the tool with a cutting movement in contact with the surface thereof, along preselected cutting paths, in order to produce corresponding decorative marks on the surface. The method further includes the step of providing a support for the item, the support being rotatable about an axis extending along the axis of the relative translation between the tool and the item so that the tool is driven in contact with the surface during the combined and simultaneous rotary and translational movement of the item.

Abstract: A process for the production of an alloy based on gold, the titer of gold being between 8 and 22 karats, comprises three phases. In the first phase, copper and titanium are subjected to fusion forming a first fused product. In the second phase, the metallic product obtained in the first phase is fused with the other components of the alloy, including silver and zinc, except gold, and in the third phase, the metallic product obtained in the second phase is fused with gold. The alloy is free of nickel and cobalt and may contain other elements in small amounts such as silicon, boron, indium, iridium and ruthenium. The amount of titanium at the most is 1%.

Abstract: A process for making an ornamental chain which has portions of different width consists of subjecting links of same size, same shape and same diameter of the wire to different compression between two clamps. In the chain produced by the process there are portions of constant width and intermediate portions of the degrade type, with increasing or decreasing profile.