The material cools so immediately that atoms in the melt are not able to arrange themselves into a crystalline framework. Hence, pumice is surely an amorphous volcanic glass often known as a "mineraloid." 【NATURAL STONE】- Lava pumice stone is a normal and porous stone with mild abrasive features, that makes https://bookmarking1.com/story19415571/facts-about-pumice-stone-suppliers-revealed