Thnx. You might be able to tell easier if you gently tap & scrape a bead against something glass or against your tooth. Plastic beads will sound dull & soft. Glass beads will sound hard, maybe even give you chills LOL
Um.. I think it might be a combination with beads cause some of the sound like they are torturing the glass and sound like they could be best that probably a wierd analogy but then i haven't ever tried to find out wether beads are glass or not so i could just be crazy lol