Ichi chigadzirwa chine spherical kana kuti irregular shaped particles. Inoratidzika yepepuru yakatsvuka kana yeorange yakatsvuka nehunyoro. Chimiro chayo chikuru isilicon dioxide uye kuchinja kwemavara nehunyoro hwakasiyana. Kunze kwekuita kunge bhuruusilica gel, haina cobalt chloride uye haina chepfu, haina kukuvadza.