Pietre dure

Pietre dure is like a big puzzle made out of really pretty rocks that people have collected. It's kind of like making a picture out of really colorful Legos, but the Legos are rocks instead. People who make pietre dure take these colorful rocks and carefully cut them into different shapes, like squares or triangles. Then, they fit them together like a puzzle to make a beautiful picture or design. It takes a lot of patience and skill to make pietre dure, but the results are very beautiful!