- This rockhounding page no longer exists but a partial copy was captured by the Internet Archive in March 2013. Most images and map links are no longer valid but you can get some tips on a few rockhounding sites.
- Rhombicuboctahedron (Wikipedia)
In geometry, rhombicuboctahedron is an Archimedean solid with 26 faces, consisting of 8 equilateral triangles and 18 squares. It is named by Johannes Kepler in his 1618 Harmonices Mundi, being short for truncated cuboctahedral rhombus, with cuboctahedral rhombus being his name for a rhombic dodecahedron.