serpentine powder

Serpentine powder refers to the earliest form of gunpowder, created by dry-grinding its components: potassium nitrate, charcoal, and sulfur. This method resulted in a variable and unpredictable powder. Factors like packing density and vibration could cause it to fizzle or detonate. Additionally, the components would separate during transport, requiring remixing before use, which was hazardous due to the creation of explosive dust.1

This contrasts with later developments like "corned powder," which involved wet grinding and granulation, leading to a more stable, uniform, and powerful propellant. It's important to distinguish this from "serpentine" as a mineral, which is a magnesium silicate, or "serpentine ware," a type of pottery.234