Does amethyst have healing powers or is it mind over matter?

Amethysts has long been believed to have healing powers, more specifically, it aids sobriety. I don’t know if anyone has had firsthand experience with this or is it all in the mind like those placebos that doctors sometimes give the over-keen-to-be-ill patients. The ancient Greeks believed that amethyst made one immune to the effects of alcohol. mmm ...people tend to believe any "ancient belief".  Well amethyst is just basically quartz with purple colour derived due to the presence of manganese,  ferric thiocyanate or sulfur. Its just regular old quartz. Thus the healing powers? There are no healing powers, it’s just the power of BELIEF.... Mind over matter.