The material cools so rapidly that atoms during the melt are unable to organize by themselves into a crystalline structure. So, pumice is surely an amorphous volcanic glass referred to as a "mineraloid." 【Purely natural STONE】- Lava pumice stone is often a natural and porous stone with gentle abrasive traits, https://bookmarkleader.com/story19445812/5-easy-facts-about-pumice-stone-wholesalers-described