Blueschist at work!

This is a view of an old millstone left on the road at the village of Ambelakia.
Who ever thought of using blueschist to grind wheat? No idea if the deformation somehow aids the ability to mill things.

The entire village is paved with blueschist. The walls of the houses are made of blueschist stone. The museum houses archeologic tools made of blueschist. Who woulda thought? It's not just a wonder-rock, but a useful rock!