<P> Pumice ( / ˈpʌmɪs / ) , 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 . It is typically light colored . Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles , thicker vesicle walls and being dark colored and denser . </P>
<P> Pumice ( / ˈpʌmɪs / ) , 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 . It is typically light colored . Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles , thicker vesicle walls and being dark colored and denser . </P>
name of stone which never sink in water
name of stone which never sink in water
Pumice
Pumice