Products/crystals that shield from EMF's

A question:
I'm working for a company that sells BioElectric Shield, which is a pendant that "is composed of a matrix of quartz and other crystals" that supposedly shields the wearer from EMF's. Anyone know about this?
Could we make our own "BioShields"? What stones would shield you from EMF's? I'm asking because I'm living right next to a powerline and am having lots of negative reactions.
For more info on BioShields, go to: http://www.promolife.com/products/subtle.htm.
*EMF = Electro Magnetic Fields, put off by electronics, powerlines, etc. The above link and this one: http://www.promolife.com/products/emf.htm#ELECTRO-MAGNETIC POLLUTION have good info on it.

DeLani, I've worn a Bio-Electric Shield for years and at one point corresponded with the company president about it. She impressed me as a person of wide knowledge and integrity. She is carrying on the work of her late husband, a chiropractor (I believe) who originated the Shield.

I wouldn't personally attempt to make my own, since years of study and work have gone into the making of the Shield (for those who are interested, here is a link to the Bio-Electric Shield maker's site: http://www.bioelectriccompany.com/be_home.htm) and it is said to be very specific in the ways it protects the human energy field. I know for a fact that the Shield has helped me in terms of resistance to EMF's -- before, when I would sit at the computer for hours, I felt achy and flu-y; wearing the Shield, I can be on Aeclectic for days at a time without feeling drained!