Packaging for this is super secure and each one is in its own styrofoam pocket. These are substantial in weight and are NOT just faceted plain glass. I am unsure of the lead content, but enough to throw rainbows and create a true sparkle. I have saved most for my Christmas tree, but the others I’ve used right away in a wind chime of my Grandmothers old silver. Not the rainbows are not large because the facets aren’t large.