I don't use hair dryers, just my fingers, so I've missed out on the latest development in the technology: ionic dryers that employ tourmaline.
Dryers that add negative ions to their output are said to help prevent static and associated frizziness. This makes sense to me, and Julyne Derrick, my colleague the Beauty Guide, testifies to its truth. She ranks ionic dryers among her top choices. But what about the tourmaline? That makes sense to me too, because tourmaline is well known for its electrical trick called pyroelectricity.
Pyroelectricity has been known since ancient times and is well known among mineralogists. You can heat a tourmaline crystal and watch it start picking up small things, like lint and paper scraps, as it cools. Pyroelectricity is not a bogus technology, but it can set off the woo-woo detectors in many people who are wary of anything crystal-related. (Cambridge University has a good tutorial on pyroelectricity.)
In this case tourmaline passes my strong woo-woo detectors. I can't say the same for using tourmaline in hair irons. I may be wrong, but the idea that tourmaline works its wonders in those conditions may be an instance of crystal-magic marketing.