A polyhedron with 24 faces, formed by placing a pyramid on each of the four faces of a tetrahedron.
From 'hexakis' (sixfold multiplication) + 'tetrahedron' (four-faced polyhedron). This geometric term comes from Greek mathematical tradition.
Diamond cutters famously use these shapes when cutting gems—the 24 faces help the stone sparkle brilliantly by reflecting light in perfect mathematical ways!
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