It’s the Converter -> Math node, with “Multiply” selected in the node’s dropdown menu (defaults to “Add”).
That worked beautifull, thank you all!
For the record. This helped me as well.
I was working on a logo for a non-profit i volunteer at.
The glass BSDF shader didn’t work as expected.
This spoofed the effect just fine for me.
Sometimes it doesn’t have to be accurate, it just has to get the job done.
Thanks everyone for your help/attempt to help. 