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/adamhanson]

But nature doesn't do checks notes right angles

[u/SimilarTop352 → u/adamhanson]

Biology maybe. "simple" chemistry does every angle achievable with a crystal matrix. There are lots of possibilities tho and 90° is just one

[u/TotallyNotaBotAcount → u/SimilarTop352]

Came hoping to find this reply..

[u/TotallyNotaBotAcount → u/TotallyNotaBotAcount]

I came twice