Pealite

Pealite is a naturally occurring volcanic rock. It is a type of pumice, characterized by its vesicular texture and generally light color. Pealite is formed during explosive volcanic eruptions when frothy lava is rapidly cooled. The rapid expansion of gases trapped within the lava creates numerous pores, resulting in a lightweight and porous stone. Its exact composition can vary depending on the source volcano, but it is typically felsic, meaning it has a high silica content.

The porous nature of pealite makes it buoyant and an effective insulator. Historically, pealite has been used in various applications due to these properties. It has been employed as an abrasive material, a lightweight aggregate in construction, and as a decorative element. Its ability to absorb liquids has also led to its use in horticultural applications, such as improving soil drainage. Deposits of pealite are found in volcanic regions around the world. The appearance of pealite can range from white and gray to yellowish or reddish hues, influenced by the presence of minor mineral impurities.