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In the natural environment, regular polyhedra can be found in the form of crystals (minerals). The form of the tetrahedron is transmitted by antimony sodium sulfate.

Even a rough diamond clearly conveys the shape of an octahedron. After grinding, the stone corresponds exactly to the geometric shape of the octahedron.

The structure of the perovskite molecule, the chemical formula is CaTiO_{3}, exactly corresponds to the correct polyhedron.

Spinel. The stone got its name from the Latin "sp'inella" - a small thorn.

Cube - single crystal combines the crystals of salt NaCl.

The pyrite crystal (pyrite FeS) is in the form of a dodecahedron. Pyrite (from the Greek. "Pir" - fire) - sulphurous iron or pyritic sulfur, the most common mineral from the group of sulphides. The size of pyrite crystals reaches several centimeters.

Bor - has the shape of an icosahedron

What happens if a flat geometric shape, such as a rectangle, begins to rotate rapidly relative to...

Can a polyhedron be curved? Perhaps this is some kind of mistake? Or maybe this is not a...

Which geometric solid known to us has the greatest strength? Which is most resistant to external...

When we demonstrate polyhedra assembled from the Magic Edges set, people often ask the same...

The Lighthouse of Alexandria, one of the Seven Wonders, was built in the 3d century BC in an...

The monument to the “Truncated large dodecahedron” polyhedron was discovered in Obninsk (Russia)...

In the second half of the 19th century, a new way of teaching was born in the US schools - the...