👉 Pumices are small, round stones or pebbles that are often used as decorative elements in landscape design. They can be found on beaches, cliffs, and other water bodies. Pumices are usually made of silica sand, which is a mineral with a hardness of 6-8 and a density of about 0.94 g/cm³. Pumices have a distinctive appearance due to their rough texture and often appear in natural formations such as stalactites and stalag
