Collection: Volcanic Glass Group

The Volcanic Glass Group encompasses a variety of naturally occurring amorphous materials formed from the rapid cooling of molten lava. Unlike crystalline rocks, volcanic glass lacks a defined crystal structure due to the swift rate at which it solidifies, preventing the formation of minerals. This group includes well-known varieties such as obsidian, pumice, and scoria. Obsidian, for instance, is formed from felsic lava that cools so quickly that crystals don't have time to grow, resulting in a smooth, glassy texture. Pumice, on the other hand, forms when gas-rich lava is rapidly depressurized, creating a frothy, vesicular texture. These glasses are often rich in silica, giving them their characteristic hardness and brittleness.