The weekend-long event, which is one of the main highlights of the Edinburgh Science Festival, sees professional and amateur competitions taking place on Dunbar beach.
Take a look at some of the weird and wonderful sculptures created from rocks and stones in our picture gallery.
5. Stone sculpture
The championships now in its fifth year. Photo: Jeff J Mitchell
6. Work of art
The event is the largest championships for all Stone Stacking and Rock Balancing enthusiasts and artists. Photo: Jeff J Mitchell
7. A stunning site
This sculpture looks amidst the sea backdrop. Photo: Jeff J Mitchell
8. Raise it up
This competitor is creating a very intricate piece. Photo: Jeff J Mitchell