Nocebo Placebo I. Satin paper, quartz (believed to augment crystal resonances), amethyst (believed to relieve pain), garnet (believed to heal blood disorders), tourmaline (believed to aid healing), thread. Source data: Colloca L, et al. Overt versus covert treatment for pain, anxiety, and Parkinson’s disease. Lancet Neurol. 2004;3(11):679—684.
