A beaker filled with water to show the different densities of pumice (top) and a stone. Pumice, called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source |
Taille de l’image : | 3224 px × 4928 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |