Pyrite discs, also known as pyrite suns or pyrite dollars, are a form of pyrite in which the crystallization structure forms a disc with radial striations. Pyrite discs are unique to the area ...

The surface irregularities on the pyrite disc are transformed into synthesized sounds. 6 / 7. Ra uses a Raspberry Pi and Arduino Nano as its brains, and features a digital sound processor, ...

Dmitry Morozov, an artist from Moscow, has managed to create a device that is able to read irregularities on a 300 million-year-old disc of Pyrite, turning those irregularities into sound.