What is orbicular rhyolite?

Orbicular rhyolite is a volcanic rock characterized by its unique spherical or orbicular structures, often formed by the crystallization of minerals in a specific pattern. It typically contains a high silica content, which contributes to its light color and fine-grained texture. The orbicular patterns result from the growth of mineral crystals, such as quartz and feldspar, within the volcanic matrix. This rock is often found in volcanic regions and is prized for its aesthetic appeal in decorative stonework.