No, I don’t think the chesea filter in particular will work, but, there must be a way to check without a mass spec.
Someone else asked this a few years ago, no better answer: Paraiba or Copper Bearing Tourmaline, How can I know? - #6 by Iamahperry
No, I don’t think the chesea filter in particular will work, but, there must be a way to check without a mass spec.
Someone else asked this a few years ago, no better answer: Paraiba or Copper Bearing Tourmaline, How can I know? - #6 by Iamahperry