These English Mountains Sing Like Bells
You can play actual melodies on rocks harvested from Skiddaw mountain. These rare lithophones produce a resonant, bell-like tone that far outshines the dull sound of standard slate.
Local stonemasons spent two centuries perfecting these musical instruments by selecting specific hornfels stones that vibrate with musical precision. When struck, these natural rocks produce clear, sustained notes that mimic a professional xylophone. It is a strange marriage of geology and art that transforms heavy mountain debris into a refined concert instrument. You can still find these unique stone sets preserved today as a testament to the acoustic beauty hidden in the hills.
Source: Musical Stones of Skiddaw