| In contrast to crystals that resemble textbook drawings, the most frequently encountered gold crystals are skeletal octahedra. |
| The structure of boehmite consists of double layers of oxygen octahedra partially filled with Aluminium cations. |
| The fluorite tends to occur only as cubes modified by the dodecahedron, with simple cubes or octahedra uncommon or absent. |
| Most that I have seen have been elongated octahedra or other forms, such as some of the branches of an arborescent aggregate. |
| Peterson and Jordan go on to investigate interesting links between integer octahedra and integer antiprisms. |
| She notes that lime-green to purplish-green modified fluorite octahedra have been found at this pegmatite. |
