What are tumblestones?

Answer 1

Tumblestones are natural pieces of gem which are tumbled with water and polishing compounds to give a lovely rounded, smooth shiny surface.

Answer 2

Tumblestones are small, polished stones used for decorative purposes, often in crystal healing or metaphysical practices. They are typically tumbled in a machine to create smooth, shiny surfaces and are believed to have various energetic properties.