Coesite High temperature and high pressure polymorph of quartz (500-800 deg C, ~ 30-35 kbar). Formed in impact craters and ultra-high-pressure eclogite rocks. from http://webmineral.com/ Used in ceremony, for protection,from illness and bad luck. Divination is enhanced. Artistic capabilites. Medical intuitives may find Coseite helpful. Coseite is helpful, in grounding, centering, releasing negativity, to bring a sense of calm and peacefulness.