Amethyst waa nidaam crystal saddex geesood ah, crystal waa columnar lix geesood ah, oogada cylindrical waa transverse, waxaa jira qaab bidix iyo qaab saxda ah, mataanaha-crystal waa mid aad u badan.Adayggu waa 7. crystal inta badan waxa uu ka kooban yahay gaas aan caadi ahayn ama baalal leh oo dareere ah.