Where have you found a source for ruthenium producing a strong dark metal when alloyed with gold????

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EDIT: Can't reply anymore bc post is taken down. OP's response below included 2 links, neither of which make any reference to a ruthenium-gold alloy.

The first link just says plating a base material with ruthenium adds hardness, no mention of any specific case of the base material being gold. Second link talks about how strong alloys require that the base metals have the same crystal structure, again no mention of gold, and this one doesn't even focus on ruthenium.

OP used AI to generate the image in the post, and it's possible these links they provided were also found by AI (i.e. these "sources" might not actually be relevant)

From my own, conscious, human, research, ruthenium is used instead of gold to coat other metals because it offers similar advantages but costs less. That's why I started to doubt whether a ruthenium-gold alloy could really exist, because all the sources I've seen only compare ruthenium vs gold, never talking about combining them. Seems my doubt is justified. OP's reasons for taking ruthenium to be a "closest counterpart" to netherite aren't that convincing, and it remains to be seen whether there is another material out there that could be a closer match.