White nylon plastic with a matte finish and slight grainy feel.
About this Product
This 12 sided die is an interesting variation on the standard dodecahedral dice.
It's an octahedral pentagonal dodecahedra, an isohedron. It's also known as a pyritohedron, since it's one of the crystal forms of pyrite. This is just one example of the infinite number of pyritohedra. They typically look like a slightly warped version of a regular dodecahedron.
For more information on unique dice shapes, see http://loki3.com/poly/fair-dice.html.