Himalayan salt lamps like Tourmaline are pyroelectric, no it doesn't mean it's for pyromaniacs, it means they produce negative ions when heated, the salt lamp to a much less extent (I.e., so low it can’t be measured) than tourmaline; tourmaline is used in a number of audiophile products, including my Particle Accelerator ion gun. Of course many air purifiers operate by producing negative ions. So here’s a question for the group: what’s the deal with negative ions? Why are they good and positive ions bad? What's up with that?
