There is a threedimensional projection of a 4D object named "tesseract" the shape of which is the (common) rhombic dodecahdron. Stanko Bilinski (re)discovered a second type of a rhombic dodecahedron.
This pendant brings together the tesseract projection and Bilinskis rhombic dodecahedron.
The inner links partly feature innovative "elastic fit", i.e. short, compressed links appear slightly thicker than long, extended ones.