Ever roll a die and just KNOW the answer in advance? This die is a foregone conclusion. It''s based on the unistable polyhedron from http://mathworld.wolfram.com/UnistablePolyhedron.html ; if I did things right it should ONLY be able to land on one face (the opposite edge is helpfully marked with a single split pip)
(General advice: dice look good in detail material)
Print has come back and this die does NOT work as advertised! It seems to have more than one place it can come to rest. Back to the drawing board.
I think the problem lieth with the light weight of the material and the surface ridges that detail material has from the printing process (my sample was printed in black detail). Trying one with much shallower slanted sides, so the weight of the wider bottom is more significant.