Diamonds - cubic & octahedral - Africa (8457822945)

A rough diamond is a

diamond Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the chemically stable form of carbon at room temperature and pressure, ...

that has not been

cut Cut may refer to: Common uses * The act of cutting, the separation of an object into two through acutely-directed force ** A type of wound ** Cut (archaeology), a hole dug in the past ** Cut (clothing), the style or shape of a garment ** Cut (ea ...

or processed. They come in a variety of naturally occurring shapes, including

octahedral In geometry, an octahedron (plural: octahedra, octahedrons) is a polyhedron with eight faces. The term is most commonly used to refer to the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet a ...

(eight-sided bipyramid), cubic, and triangular (most commonly

macle {{no footnotes, date=April 2009 Macle is a term used in crystallography. It is a crystalline form, twin-crystal or double crystal (such as chiastolite). It is crystallographic twin according to the spinel twin law and is seen in octahedral cryst ...

s). A raw diamond or rough diamond can also be a type of diamond that is not fully developed or can have less brilliance. Extreme heat and pressure beneath the ground make the

carbon Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon mak ...

atoms fuse in a specific structure.

References

Diamond {{mineral-stub}
Raw Diamond
at Gemone Diamond

See also

References