PGM to Runes conversion?

Hello

I am slowly, but steadily accumulating PAme collection and I was wondering, what would be the ratio of

Conversion from PGM to some high-ish runes?
Mostly asking about amethysts, but curious about others aswel. I checked some old pre-ressurected d2 prices and they were at around 20 PAme/30 PRuby/40 PGM for an

Ist.
Is that anywhere close and if not, is it more or less?

Thanks in advance

So I got 40 pgems for a

Lem yesterday. I thought it was a good deal, but didn't realize what kind of a good deal it apparently was. :O

It's much less now. I think its around

Pul for 40PGms/ 20 Amethysts or Rubies