Uuuuh, what a discussion.
I do not want to for for opticals, but I have googled a bit more for Ruthenium.
They do not only use it with ULTRASONE headphones, it is also used by BMW (steeringwheel inlay in the 550i), by Hansgrohe sanitary (shiny dark-grey high-class sanitary objects), by Braun (for the blades of the shavers) and a couple of others things like jewelery....
Why? For sure not because all these famous companies try to kill us. If you continue to google for galvanic companies, you will easily find out that ruthenium gives the surfaces not only a high-gloss surface, but is also very hard and very resistant against almost all chemicals.
The ones who maybe in danger, are the ones who are mining this rare material together with platinum or the ones who are sniffing the ruthenium powder instead of creating a galvanic surface for highly exclusive products.
So lets get back to basics: the quality of the headphone!!!