Cinder

Cinder is a material formed from the ash and debris produced during volcanic eruptions. It typically consists of small, lightweight fragments that are glassy or porous due to rapid cooling of lava. Cinder can accumulate around volcanoes, creating cinder cones—small, steep-sided hills formed from volcanic ash and rock fragments. In addition to its geological importance, cinder is sometimes used in landscaping, to improve soil drainage, or as an aggregate in construction, offering benefits like reducing weight and providing insulation. Its unique properties make it a valuable resource in various applications.