How long does it take for obsidian to break down?

Answer 1

15.5 seconds

Answer 2

Obsidian is a naturally occurring volcanic glass, so it can last for millions of years if not exposed to external forces. The rate at which obsidian breaks down depends on factors like weathering processes, exposure to water or chemicals, and physical abrasion. In most cases, it can take thousands to millions of years for obsidian to fully break down into smaller particles.