Update
Changing my review from 3 stars to 5 because the customer service is excellent. They reached out to me, and offered to send a replacement for the necklaces I received that where not the best quality (glue can be seen, and scuffed with green marks) and the replacement they sent where much better quality and this time did not have any green marks or visible glue marks on it. I'm still not sure it's actual tourmaline, but it's a nice powerful protecting crystal anyway.
Rating: 5 stars