Copper is the Secret Sauce
Without copper, the Paraiba Tourmaline wouldn’t achieve its vivid blue-green color. Bluish green, Greenish Blue, violet — no other stone has such vivid colors as the Paraiba Tourmaline. Not only is this gemstone beautiful, but it’s also strong, making it a great stone to wear. If you are interested in buying a Paraiba Tourmaline, we suggest that you don’t buy unless it has a reputable lab certification. There are many reasons to buy a certified gemstone. Here are just a few from AJS GEMS
https://www.ajsgem.com/gemstone-information/paraiba-tourmaline-48.html
Heavily-included tourmalines, such as rubellite and Brazilian paraiba are sometimes clarity enhanced. A clarity-enhanced tourmaline (especially paraiba) is worth much less than a non-treated gem.
