What Is Pumice Stone ? Pumice stone is a lightweight, volcanic rock formed when lava cools quickly and traps gas bubbles, ...
However, the abrasive character of this volcanic rock also makes it useful for cleaning. Pumice is created when ... is a ...
The stretch of golf-ball-size pumice rocks was first spotted this week by a New Zealand air force plane about 1,000 kilometres northwest of Auckland. The rocks stretch for about 26,000 square ...