### Combination of Icosietetrahedron and Octahedron

The combination of an icositetrahedron and an octahedron.

### Combination of Pentagonal Dodecahedron and Octahedron

"...resembles in general appearance the regular icosahedron of geometry, but only eight f the faces…

### Combination of Pentagonal Dodecahedron, Cube and Octahedron

Represents the combination of pentagonal dodecahedron, cube, and octahedron.

### Combination of Pentagonal Dodecahedron, Dyakis-dodecahedron, and Octahedron

Represents the combination of pentagonal dodcahedron, dyakis-dodecahedron and octahedron.

### Combination of Triakis-octahedron and cube

The combination of a cube and a triakis-octahedron.

### Cube in Combination with Octahedron

Represents the combination of an octrahedron and a cube, with the cube faces predominate.

### Cube, octahedron and dodecahedron

A cube, octahedron, and dodecahedron.

### Octahedron trunctuated by cube

"When a corner or an edge of one form is replaced by a face of another form, the first is said to be…

### Cubo-octahedron

Represents the combination of a cube and an octahedron, with both faces being equal.

### Dodecahedron and octahedron

A dodecahedron and octahedron

### First Right Square Octahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

### Galena

A combination of the cube (h), the octahedron (o), and the dodecahedron (d).

### Hexahedron and Octahedron

Illustration showing the combination of a hexahedron and an octahedron.

### Hexahedron and Octahedron

Illustration showing the combination of a hexahedron and an octahedron.

### Octahedron

A polyhedron with eight faces.

### Octahedron

"Right octahedron with rhombic base." — Hallock, 1905

### Octahedron

"Right octahedron with rhombic base." — Hallock, 1905

### Octahedron

"Oblique rhombic octahedron." — Hallock, 1905

### Octahedron

An octahedron, or double four-sided pyramid. It has 8 sides.

### Octahedron

Illustration showing a perfect octahedron.

### Octahedron

Principal forms of the isometric system: octahedron.

### Octahedron and dodecahedron

A combination of octahedron and dodecahedron.

### Octahedron and Dodecahedron

Illustration showing the combination of a octahedron and an dodecahedron.

### Octahedron and pyritohedron

"Combiantion of pyritohedron and octahedron." — Ford, 1912

### Octahedron and pyritohedron

"A combination of pyritohedron and octahedron." — Ford, 1912

### Octahedron and trisoctahedron

"A combination of a trisoctahedron and an octahedron. It will be noted that the faces of the trisoctahedron…

### Octahedron in Combination with Cube

Represents the combination of an octahedron and a cube, with the octahedron predominate.

### Cube trunctuated by octahedron

"When a corner or an edge of one form is replaced by a face of another form, the first is said to be…

### Distorted octahedron

A distorted octahedron.

### Pattern for Octahedron

Pattern that can be cut out and folded to construct a regular octahedron. Fold on the dotted lines,…

### Tetrahedron From Octahedron

Illustration showing the derivation of Tetrahedron from an Octahedron.

### Twinned octahedron

"A contact twin, since the two individuals lie simply in contact with each other upon a certain plane."…

### Regular Polyhedrons

Illustration of regular polyhedrons: tetrahedron, hexahedron, octahedron, dodecahedron, icosahedron.

### Prism

"Right rhombic prism." — Hallock, 1905

### Prism

"Doubly oblique prism." — Hallock, 1905

### Pyritohedron and octahedron

"A combination of pyritohedron and octahedron." — Ford, 1912

### Pyritohedron, cube, and octahedron

"A cube trunctuated with pyritohedron and octahedron." — Ford, 1912

### Regular Octahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

### Second Right Square Octahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

### Various Solid Forms

Illustration containing a tetrahedron, hexahedron, octahedron, dodecahedron, and icosahedron, placed…

### Spinel-twin

"An octahedron twinned on an octahedral face has the two portions symmetrical with repsect to a plane…

### Suphur

"One allotropic forms of sulphur, that of a lemon-yellow brittle solid, crystallizing in orthorhombic…

### Triakis-octahedron

"This solid is bounded by twenty-four isosceles triangles, and may be considered as an octahedron with…

### Two Octahedra

An illustration showing "two octahedra...united by contact along a surface parallel to an octahedron…