Cubic System
The Isometric crystal system which consists of three axes, each of equal length and perpendicular to others.
Culet
A small polished surface placed at what would be the point or ridge of a facetted stone, used to reduce chipping.
Cubic System - A crystallographic system, the crystals of which may be described by reference to their axes of equal length, each situated perpendicularly to the plane of the other two. Diamond belongs to this system.
Cubic system
The axial intersection with three equal axis at right angle to each other. Another term Isometric ...
Crystals of the cubic system: a cube (e.g., pyrite) at left, and an octahedron (e.g., diamond) at right. Note the three crystallographic axes, which meet in the center, are of equal length. Enlarge Photo credit: © WGBH Educational Foundation ...
ISOMETRIC. The cubic system in crystallography.
JAGERS. Bluish-white diamonds of modern cut; originally diamonds from the Jagersfontein mine.
00:40, 11 January 2008 (hist) (diff) N Single Refraction ‎ (New page: When a beam of light enters a crystal in the cubic system or an amorphous substance, it does not split and therefore remains a single beam as it exits.) ...
Let's consider a crystal in the cubic system with both cube {001} and octahedral {111} forms represented (Figure 11). In our figure, we have used the letter designation of -a- for the cube faces and -o- for the octahedral faces.
Fifteen different forms are possible within the isometric or cubic system. These include the hexoctahedron, gyroid, hextetrahedron, diploid, and tetartoid, among others.
All minerals which are not part of the cubic system are double refracting, where ordinary light passing through them is broken up into two plane polarized rays that travel at different velocities and refracted at different angles.
All gems whose crystals belong in the cubic system are singly refracting in all directions: In the case of some other systems of crystals the material may be singly refracting in one or in two directions, but doubly refracting in other directions.
Look at the second of the "typical forms" for the cubic system shown in the diagram above. Can you see it as two pyramids attached to each other, base to base?
The cubic (Isometric) crystal system is characterized by its total symmetry. The Cubic system has three crystallographic axes that are all perpendicular to each other, and equal in length.
Common forms in the cubic system are the tetrahedron (4 faces), the cube (6 faces), the octahedron (8 faces), the dodecadehedron (12 faces), the trapezohedron (24 faces), and the hexoctahedron (48 faces).
D
DIAMOND - A mineral that crystallizes in the cubic system and is composed of carbon with a hardness of 10, a refractive index of 2.417, and a specific gravity of 3.52.
Diamonds crystallise in the cubic system.
Cubic Zirconia
Cubic Zirconia, CZ, or C.Z., is the most successful diamond simulant. Chemical formula ZrO2.
axes Plural of axis. These are three imaginary perpendicular lines by which the cubic system is defined in diamond.
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B.S.D. Abbreviation for brilliance, scintillation and dispersion.
Anisotropic...Crystals in which the optical properties vary with direction. All crystals except those in the cubic system are in this category, and exhibit double refraction.
System Number of Crystallographic Axes Number of Planes of Symmetry Number of Axes of Symmetry Center of Symmetry Refractivity Shapes Gems Cubic systems
3 crystallographic axes (of equal length) at right angles to each other
9 ...
It is composed of three axes of equal length that intersect each other at 90° angles. It is commonly called the cubic system. All gemstones in this category are singly refractive. Examples include diamond, spinel and garnet.
Within each of the systems, the cyrstals can mineralize into different crystal habits (form). The seven crystal systems are: cubic systems, tetragonal systems, hexagonal systems, trigonal systems, orthorhombic systems, monoclinic systems, ...
Of the six types of crystals only five are large enough to be used in jewelry. The garnet crystals form in a cubic system with a twelve-faced rhombic dodecahedron and the twenty four faced icostetrahedron and in combinations of these two forms.
The seven crystal systems are: cubic systems, tetragonal systems, hexagonal systems, trigonal systems, orthorhombic systems, monoclinic systems, and triclinic systems. For more information on crystal systems, click here.
In addition, it is also important to note that all the three vectors used to define the rhombohedral bravais crystal lattice are not mutually orthogonal. The rhombohedral bravais crystal lattice is similar to the cubic system being stretched along ...
Garnet crystals form in the cubic system, typically as a 12-sided crystal or dodecahedron. They are available in all colors except pure Blue. One problem with some types of garnets comes from their deeply saturated color.
 See also: Crystal, Mineral, Minerals, Crystals, Stone
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