“All things are made of vibrations, and have their own magnetic properties. Certain pure gems and minerals emit radiations that are beneficial to the body of man. One such “bangle” made of gold,silver, and copper was recommended by Sri Yoganandaji for general use. He said that this bangle had more than physical value. (I remember his advising a disciple, who was prone to having accidents, to obtain and wear one of these bangles.)”

“A number of people who own these bangles have told me that, during times of physical illness (and, perhaps, of mental depression), their bangles have become so hot on one arm that they had to move them onto the other. I myself have felt a person’s bangle when he said that it felt hot. It was, in fact, much hotter than the arm itself–so hot that it almost hurt my fingers to hold it.”

—Swami Kriyananda in The Art & Science of Raja Yoga