Sphinx
"Sphinx is a Greek word signifying 'strangler,' applied to certain symbolical forms of Egyptian origin,…
Tomb of Cyrus
"Cyrus caught sight of his brother Artaxerxes, whose person was revealed by the flight of his troops,…
Orthorhombie pyramid
"Crystal faces are described according to their relations to the crystallographic axes. A series of…
Sulphur crystal
"The forms present upon it are two pyramids of different slope but each intersecting all three of the…
First order pyramid
"The pyramid of the first order is a form consisting of eight isoceles triangular faces, each of which…
Second order pyramid
"The pyramid of the second order is a form composed of eight isoceles triangular faces, each of which…
Ditetragonal pyramid
"The ditetragonal pyramid is a form composed of sixteen isoceles trianglular faces, each of which intersects…
Sphenoid
"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…
Sphenoid
"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…
Sphenoid, positive and negative
"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…
Scapolite
"A crystal of scapolite, upon which the faces of the third-order pyramid are shown." — Ford, 1912
Pyramid of the first order
"This form consists of twelve isoceles triangular faces, each of which intersects two of the horizontal…
Pyramid of the second order
"This is a form composed of twelve isoceles triangular faces, each of which intersects two of the horizontal…
Dihexagonal pyramid
"The dihexagonal pyramid is a form of twenty-four isoceles triangular faces, each of which intersects…
Apatite
"A complex crystal of apatite with the faces of a third-order pyramid upon it." — Ford, 1912
Zincite
"A crystal of zincite with a prism terminated by a pyramid above a basal pinacoid below." — Ford,…
Positive rhombohedron
"The rhombohedron is a form consists of six rhombic-shaped faces, which correspond in their position…
Negative rhombohedron
"The rhombohedron is a form consists of six rhombic-shaped faces, which correspond in their position…
Scalenohedron
"This form consists of twelve scalene triangular faces. These faces correspond in their position to…
Pyramid
"An orthorhombic pyramid has eight triangular faces, each of which intersects all three of the crystallographic…
Bournonite
"Orthohombric. Crystals usually short prismatic to tabular. Sometimes quite complex with many prism,…
Quartz
"Terminated usually by a combination of a positive and negative rhombohedron, which often are so equally…
Quartz
"Terminated usually by a combination of a positive and negative rhombohedron, which often are so equally…
Quartz
"Terminated usually by a combination of a positive and negative rhombohedron, which often are so equally…
Corundum
"Hexagonal-rhombohedral. Crystals usually prismatic in habit or tapering hexagonal pyramids." —…
Cassiterite
"Tetragonal. Common forms are prisms and pyramids of first and second orders." — Ford, 1912
Aragonite
"Orthorhombic. Acicular pyramidal; consisting of a prism terminated by a combination of a very steep…
Beryl
"Hexagonal. Strong prismatic habit. Frequently vertically striated and grooved. Forms usually present…
Wernerite
"Tetragonal; tripyramidal. Crystals usually prismatic. Prominent forms are prisms of the first and second…
Wernerite
"Tetragonal; tripyramidal. Crystals usually prismatic. Prominent forms are prisms of the first and second…
Vesuvianite
"Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second…
Vesuvianite
"Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second…
Zircon
"Tetragonal. Crystals usually show a simple combination of prism and pyramid of the first order. The…
Epidote
"Monoclinic. Crystals are often much elongated parallel to the ortho-axis with a prominent development…
Calamine
"Orthohombic, hemimorphic. Crystals usually tabular parallel to the brachypinacoid. They show prism…
Apophyllite
"Tetragonal. Usually shows a combination of prism of second order, pyramid of first and basal plane."…
Titanite
"Monoclinic. Crystals varied in habit. Often with prominent basal plane which is steeply inclined and…
Titanite
"Monoclinic. Crystals varied in habit. Often with prominent basal plane which is steeply inclined and…
Apatite
"Hexagonal; tri-pyramidal. Crystals usually long prismatic in habit; sometimes short prismatic or tabular.…
Apatite
"Hexagonal; tri-pyramidal. Crystals usually long prismatic in habit; sometimes short prismatic or tabular.…
Gypsum
"Monoclinic. Crystals usually tabular parallel to clinopinacoid; in diamond-shaped crystals with edges…
Gypsum
"Monoclinic. Crystals usually tabular parallel to clinopinacoid; in diamond-shaped crystals with edges…
Scheelite
"Tetragonal; tri-pyramidal. Crystals usually simple pyramids of first order. Closely resemble isometric…
Pyramid
A pyramid is a solid whose base is a plan figure, and whose sides are triangles uniting at a common…
Frustum
If a pyramid be cut by a plan parallel to the base, so as to form two parts, the lower part is called…
Pyramid
An architectural structure of solid masonry, built for various purposes in different parts of the world.
Obelisk
An obelisk is a tall, thin, four-sided, monument with a pyramid top. This particular one is inscribed…
