A crystal of cubic pyrite

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We find the cubes in nature, for example, in a crystal of cubic pyrite.
The image has been used in the book Il ritmo delle forme - The rhythm of the shapes.

© Franco Valoti

foto di Franco Valoti

The image belongs to the sections...:
From "fragments of topology" (From "XlaTangente")
From "towards the 4th dimension" (From "XlaTangente")
Minerals (Anthology of images)
Minerals (Symmetry)
Polyhedra around the world (3D geometry)