Protects against electromagnetic pollution.
Calms the brain and nervous system.
From Wikipedia: Amazonite (sometimes called “Amazon stone”) is a green variety of microcline feldspar. For many years, the source of amazonite’s color was a mystery. Naturally, many people assumed the color was due to copper because copper compounds often have blue and green colors. More recent studies suggest that the blue-green color results from small quantities of lead and water in the feldspar.