I have heard that the amethyst layer blocks water vein waves. What are these?
Both the mat and the pillow and the crystals themselves were believed to block the harmful geo-pathogen rays from the underground rivers with heavy water from the deep under the earth.
These rivers are called “water veins,” and in the East, some believe that if you sleep or live on top of their crossings, or even just where they come closer to the Earth’s surface, it may cause weakness or even disease.
Western science was skeptical of such claims, but after discovering the harmful effects of radon, which is now considered cancer-causing, I suppose the old tales may have some reason.
You can find more info about water veins beliefs here: