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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 perovskite molecule structure, the chemical formula is CaTiO3, exactly corresponds to the correct polyhedron.

Spinel. The stone got its name from the Latin "Spinella" - 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) - sulfurous iron or pyritic sulfur, the most common mineral from the sulfides group. The size of pyrite crystals reaches several centimeters.

Bor - has the shape of an icosahedron.

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

ARCHIMEDES (287 - 212 BC) - Ancient Greek mathematician, physicist, and mechanic. Archimedes is...

IIn issue 25 of the Magic Edges, we noticed that we get a cross-sectional cut at the cut point by...

The box geometric shape from a distance resembles a rounded shape, emphasizing the similarity with the...

The invention of the calendar is a remarkable event for humanity. The fact that a year consists of...