What is dioxide silver?

What is dioxide silver? A friend went to Metalliferous to shop for
Argentium and was told that they don’t carry it, but do have dioxide
silver. Anybody out there know what it is, and how it compares with
Argentium, if at all?

Dee

About a year ago I took my silver scrap to AAA refinery here in
Portland Or, and traded it in for deox silver casting grain. I love
it. It casts beautifully, and does not tarnish. Could it be possible
that dioxide silver is the same thing? I did not know that one could
get it in sheet form.

Great stuff. Alma