Completely safe however, grinding it, cutting it, and shaping it into pieces for use in jewelry definitely exposes some risk of possibly ingesting particles. Have lots of green depression glass in my collection and it is perfectly safe to eat off of and drink from.
The listing was definitely way off on the style of bottle and finishing techniques. However, as a lover of colored druggist/chemist/apothecary bottles from Philly, this final price was reasonable either way for a mint large honking cobalt chemist bottle that is rare. Have not seen another in my...