No I dont think they are. I didnt make the pendants I just turned them into earrings so Im not really sure what they are made of. I do know that I have a lot of allergies when it comes to jewelry and I can wear these with no problems.
I make awareness bracelets and for a bunch of these charms for that reason. I didnt make the charms themselves I just turned them into earrings to go with one of the bracelets I made but the person that bought the bracelet didnt want the matching earrings.