👉 The term "caustical" is a scientific term used in the field of physics and chemistry to describe a type of surface that is formed by the condensation or precipitation of gas molecules, especially water vapor. These surfaces are often found on rocks, minerals, or other materials with high concentration of gases like sulfur dioxide (SO2) or nitric oxide (NO). The process involves the rapid condensation and precipitation of the gas molecules when they collide with each other at a temperature below their boiling