The rhombic dodecahedron is closely related to both the cube and the octahedron. Like the truncated octahedron, multiple copies will fill space without gaps. Approximately 22 mm across.
Our d12 is based on the rhombic dodecahedron. While a regular dodecahedron makes for a good design, the rhombic version is a nice complement to it. This polyhedron is also a space filler and is closely related to both the cube and regular octahedron.
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