SILNOVA Tarnish resistance


Both the accelerated and the real-life tests concluded that SILNOVA® formulations outperforms, in terms of overall tarnish resistance all the silver alloys it was compared with. This is made possible also by the use of palladium as an alloying element in the formulation. Most interestingly, the resistance of SILNOVA® is comparable with that of the white Ni-Pd-free 375‰ gold formulation, our positive reference for the project.

  • Based upon the large base of tests made, we can state that SILNOVA® fulfills the expectations of the research project, and the goal of obtaining the highest resistance to tarnish ever met by a silver alloy for jewellery use. Silnova resists to tarnish as much as a 375 gold alloy, and as much as 20 times as a Sterling silver. Time is not stopped on your SILNOVA® jewel, but its effect is delayed in a way never done before.
  • This definitively proves that SILNOVA® can be used natural, without plating on top.*
SILNOVA Processing


Alloy SILNOVA-01 proves suitable for the production of 925 silver jewelry using investment casting in closed systems, and for the production of semi-finished items by mechanical working such as sheet, wire and tube using static and continuous casting techniques.

SILNOVA® guarantees freedom in manufacturing processes; in fact the adequate hardness obtained by heat-hardening treatment makes it resistant to wear.

SILNOVA Hardness


Although the as-cast hardness of SILNOVA-01, set at 43 HV, is lower than the 50 HV initially set as a minimum hardness value, this alloy has a major age-hardening potential. The hardening can be obtained with a single-step hardening made at 450°cx45’, allowing the hardness to rise up to 115 HV, a value that is responding to most of the jewelry applications requests.

The hardness obtained by SILNOVA® alloys represents the best compromise between antitarnish properties and processing needs.



SILNOVA® alloys are protected by patent applications at Italian and at international level, thanks to their innovative formulations.


No alloy in the jewelry market has till date undergone so many different corrosion tests, and in such harsh testing conditions.
No other real-life study in the jewelry market has been conducted with such a large amount of data and participants from different countries.



SILNOVA® does not claim to be a stainless or inoxidizable alloy. It does not promise that it will never discolour; that would be a false statement. Its promise is that the discoloration will occur at a much lower rate than a regular silver, and that it will be easier to remove.


In order to standardize their behavior independently from stock life, SILNOVA® jewels after finishing have to be passivated using T-Pro solution from Legor Group. This step will ensure that the actual lifetime of each jewel starts in the very moment in which the item is worn for the first time, not at the time of production. Full information on the correct use of T-PRO is available in the SILNOVA® technical specification documents.