Abstract: The present invention relates to a sterling silver alloy, copper-free in its basic embodiment, age-hardenable, with improved resistance to tarnishing, thanks to the presence of palladium in combination with zinc and indium, this alloy being mainly used for the realization of precious articles; the present invention also relates to a master alloy composition suitable for the production of said sterling silver alloy.
Abstract: A master alloy composition for producing gold alloys with innovative refiners system comprising iridium (Ir): 0.01÷0.8% by weight, ruthenium (Ru): 0.002÷0.9% by weight, rhodium (Rh): 0.002÷0.8% by weight, and copper (Cu): 20÷99.965% by weight, wherein iridium (Ir), ruthenium (Ru) and rhodium (Rh) are the grain refiners.
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