octohedral

Clutched in my palm, the octohedral dice had grown warm.

Kushiel's Avatar Carey, Jacqueline, 1964- 2003

The color and brightness of the diamond are common to it with the paste from which false diamonds are made; its octohedral form is common to it with alum, and magnetic iron ore; but the color and brightness and the form together, identify its Kind: that is, are a mark to us that it is combustible; that when burned it produces carbonic acid; that it can not be cut with any known substance; together with many other ascertained properties, and the fact that there exist an indefinite number still unascertained.

A System Of Logic, Ratiocinative And Inductive John Stuart Mill 1839