 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. 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

"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

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… 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. 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…