Kyawawan yanayin rikice-rikice na agate da launuka daban-daban na amethyst, ba a sani ba na ba a sani ba na ba a yanke shawarar bayyana ta hanyar sarkar kwanyar.
Kashin da kai ya kusan zama sananne ne daga waɗanda suke yawanci bincike game da ilmin jiki, ban da ramuka a cikin crastals, ya rubuta "taken sanyi".