A regular Dodecahedron or pentagonal Dodecahedron is a Dodecahedron that is regular, which is composed of 12 regular pentagonal faces, three meeting at each vertex. It is one of the five Platonic solids. It has 12 faces, 20 vertices, 30 edges, and 160 diagonals (60 face diagonals, 100 space diagonals).
Pictures to come.
We found them in the fossicking area in the Northern Territory.