| This six-point perspective, with the six vertices of an octahedron serving as the vanishing points, becomes the basis of his spherical paintings. |
| The one exception is the exciting accidental discovery of a 4.22-carat, gem-quality octahedron in Dale County, Alabama. |
| These give the solid angles of the tetrahedron, the octahedron and the icosahedron. |
| Earth was a cube, air an octahedron, fire a tetrahedron and water an icosahedron. |
| The large four-sided facets above and below and to the right and left of the table are the faces of the octahedron. |
| While writing, I may choose a clear Quartz Crystal for clarity or a yellow Fluorite octahedron to help keep creative thoughts flowing. |
