This eyeglass strap is made of amazonite. The "stone from the Amazon". 
 
 Effect: Mood-balancing, harmonious interaction of mind and intuition, regulates metabolic disorders (liver), harmonizes the brain, vegetative nerves, internal organs, for obstetrics
 Source: Heilsteine, M. Gienger
 Express note: The information on the therapeutic effects does not replace medical or therapeutic advice.