Almost Perfect Cubes Formed in Nature

[u/Stevemoriarty]

These amazing pyrite crystal specimens are found in Navajún, La Rioja, Spain. Believe it or not, these cubes have not been cut or polished to shape. They are found just like this within the marl matrix.

[u/uluvmebby]

poor man's gold

another name for them I believe

[u/PeterNippelstein → u/uluvmebby]

Close enough