I know that black tourmaline has properties that makes it block many forms of EMF. Carrying a stone in your pocket would have little to no effect however because it doesn't shield your body. A tourmaline-embedded fabric suit would work, I believe, as long as the layers were thick enough to embed the entire fabric. Does anyone know if such a thing exists? Theoretically it would be possible to shield most of the body (including a lot of the face as masks are now something you're supposed to wear). Metal shielded clothing does not work, it would have to be grounded in order to work, and plus it may even conduct more EMF. But silica, the mineral that makes up tourmaline, is a semiconductor so it would have entirely different properties and would work more like a shock cushion. I used to work in the optics business so I know that there is science behind this, not just "woo woo." If this product doesn't exist, it should be invented. Shungite fabric also would work I believe.
You are right. I purchased a full body hunting costume that was embedded with silver mesh I believe to shield your biometric field from being felt by deer. (I was using it for EMF shielding). I went to town a few times with it and thought i felt some benefits at first, but later felt that it made things worse (a common reaction to any shielding. Shielding changes the frequency but doesn't block it; your body takes time to become "allergic" to the new frequency, but then quickly sensitizes to it). If not grounded, cannot really work (if metal. Absorbent materials would be different).
I wore this suit, complete with full face hood (this was before covid when such a thing was not normal) to the psychiatrist that was assessing me to see if I qualified for disability. I figured even if he did not believe me on the EMS, he might at least think I was crazy and give me disability for that. No luck. "You have some anxiety but it should not prevent you from getting a job," was their assessment.