This book examines agate provinces through the lens of plate tectonics, stratigraphy, agatization, and more. It delves into the physical and chemical properties of agate deposits, their environments of formation, and related silica deposits like opal, chert, and petrified wood. Examples, illustrations, maps, and thin-section photos illuminate structural, chemical, and temporal controls. Plate tectonics and lithotectonics are explored to provide a deeper understanding of the volcanic processes behind agate formation.

• Descripes physical and chemical characteristics of agate deposits correlated with conditions of deposition
• Provides an describtion of Agate deposits worldwide
• Focuses on agate deposit geology with complements Roger Pabian's "Agates"