De-ox silver has the same silver content as traditional sterling
(92.5%). Traditional sterling is alloyed with copper, whereas de-ox
contains other metals. I’ve been told Aluminum is one of them. In one
posting cadmium was mentioned, but I don’t believe that reputable
companies such as Rio Grande would refrain from disclosing this, if
it were present in their formula. It’s possible that different
dealers have different formulas though. I’m certainly going to ask!
The advantage of De-ox over sterling is that it doesn’t tarnish nor
develop firescale to any significant degree.
Tom Tietze, Artisan Workshop