Sean Knowles said:
I don't know if this was addressed, and I'm sorry to spoil an answer here (which real fans will already know this one anyway); however, the first accepted currency in Diablo 2 was not in fact the SoJ. It was widely accepted for Perfect Gems, more specifically the Perfect Skull to be a primary source of currency thanks to the magic that was the Horadric Cube. Just my two cents, but I feel that either the question should be more specific as to WHEN the currency was made standard, or maybe even the item TYPE used for currency. Just wanted to put that out there. LONG LIVE DIABLO!
We were talking about this question a bit today. In my experience, perfect skulls/diamonds were used for trade, but very very rarely for high end items - as they would still take an unreasonable quantity versus just a few SoJ's. I've also never seen a farmer enter a game and beg for perfects, though I could fairly reliably leave a public game open for 20 minutes and have someone join and repeatedly demand "GIEV SoJs or PK".
Stone of Jordan rings in my experience were almost exclusively known as a trade currency item, and became rather famous for it, hence the "widespread adoption" qualifier. Sorry for any confusion, hopefully the way the quiz system lets you know when the answer is right prevented having to guess too many times.
Edit: I only ever had one, and I found it myself!