Diamonds shine in a variety of colors such as grey, white, blue, yellow, orange, red, green, pink, purple, brown and finally black. Colored diamonds contain inclusions and structural defects that cause them to acquire those colours, while pure diamonds are completely transparent and colorless. In terms of classification; Diamonds are scientifically classified into two main types and several other sub-types according to the impurities in the stone.
Type 1 diamonds contain nitrogen atoms, which are among the main impurities in their composition. It is found with a density of 0.1%
, but if the nitrogen atoms are compound in pairs, then in this case they have no effect on the color of diamonds
If these atoms are found in multiple pairwise groupings, they give the diamond a yellow to brown color.
Prepare 98 % of type 1 diamonds Most of them belong to the Cape series, which is named after the region rich in diamonds, formerly known as the Cape Province in South Africa, and this falls under the first section of this type. Where the impurities of the stones in that province fall under the first type.
In the case of nitrogen atoms distributed over the crystal in several places Isolated and scattered, they give the stone a dark yellow color or sometimes brown. The type where it represents 0.1%, and it is one of the rarest known natural diamonds and represents the second section of this type. Diamonds in this type absorb infrared and ultraviolet rays. They are also distinguished by their wonderful brilliance and absorption of the visible spectrum rays.
In contrast to the first type; Diamonds in the second type are free from nitrogen impurities and also absorb infrared rays and transmit ultraviolet rays to places that reach an area less than 98 nanometers and this is unlike the first type. It also has its own distinctiveness with its wonderful qualities, but it does not absorb the visible spectrum rays</li
As for the colors of this type, they may be pink, red or brown, and these colors are due to external distortions of the stone. Diamonds arising from deformations of the plastic material during crystal growth are rare, and this rarity reaches 1.8% among gem diamonds, but it constitutes a large proportion of Australian production of diamonds. Light blue diamonds, which represent 0.1% of diamonds, also fall under this type.
The light blue color is due to the diffusion of the boron element inside the crystal.
The formation of diamond colors is due to To several things, for example: Both the red and pink color are due to the impurities of the plasticine material in the crystal lattice from heat and pressure.
(As for the black color, it was formed due to microscopic impurities that carry black or gray color from some other materials such as graphite, sulfide and/or microscopic fractions. The formation of opaque and sparkling white is also due to microscopic impurities
The purple color is caused by its formation A group of lattice crystal inclusions and also due to the high degree of hydrogen Yeh.
Most of the diamonds mined represent a large variety of pale yellow or brown color, which It is the natural color of the stone.
A dull yellow or brown diamond or any other color is called a diamond with the color of love.
Diamonds of a higher degree of purity are completely colorless and appear bright white.
A diamond is valued according to several factors, its body color being one of four valuable factors.
There is a device to determine the color grades of diamonds, and among those grades is the transparent color, which is the most rare and the most expensive because of its white color and its radiance to the eye.
History of the diamond color grading system
The London Diamond Association developed this procedure as a first step in sorting raw diamonds for sale. Color grades were introduced by the involved parties in the diamond trade as the trade developed, but without coordinated development, the system lacked the requirement of naming and cohesiveness, as numerous names were employed to describe the varied shades of colour.
Natural diamond color range hues
Natural Diamond Colors
This refers to the range of natural diamond colors that have been used by laboratories recognized international. It is worth noting that the grading scale of this range ranges from colorless transparent to pale yellow or brown.
A diamond’s colour grade is determined by comparing a sample stone to a collection of other large stones. Whereas the color’s tone, at the very least, is the degree of body that it conveys. The person in charge of establishing colour grades also compares an unknown stone to other major stones, from which he may determine the stone’s colour grade.