What a great video. These looked great, I love the ones with the green colors. I run plastic beads in my rotaries, they don't seem to grind down to bad. The plastic beads are horrible to sort away from the stones though. I'm actually doing a load with this stone mixed with petrified wood, like you mine are at about week 16 and probably just ready to move to 120/220. I'll post a video to my channel when finished.
Yeah I have some plastic and used it when I first started tumbling but like you said it can be a pain to sort. I also didn't like how you have to keep plastic grit specific.
Well from the article I just looked at it is also known as polychrome jasper and I had no idea they were the same thing. Say it is found in Madagascar.
