This is an interesting topic, and I have to admit that I had never heard of using sulfur as an inlay before. What does it look like, pewter? Does anybody have some close up pictures of a sulfur inlay, I would like to see what one looks like. I had a York County rifle several years ago that had an odd star inlay in the cheek piece. It wasn't made of the usual Silver and I thought it might have been made from pewter, but now I'm not sure.
You learn something new every day!
Frank