Pure fancy yellow diamonds are terribly uncommon, unique and costly.
They belong to an unique group of extraordinarily uncommon pure coloured diamonds occurring in nature in myriad colours.
The standard notion is {that a} diamond is a colorless (or white) stone. The truth is most diamonds are certainly colorless. Nonetheless, a tiny share of those gem stones purchase specific shades of colours. This relies upon sure units of atmospheric circumstances present within the neighborhood of the diamonds throughout their adolescence.
How does a yellow diamond turn into yellow?
A diamond is a crystallized isotope of carbon. Nearly all of pure diamonds develop in excessive stress & excessive temperature circumstances. Such circumstances exist at excessive depths of 140 to 190 kms contained in the Earth’s Mantle. Carbon or carbon containing minerals present the seed carbon supply. The metamorphic crystallization of the carbon right into a diamond occurs over a interval of a whole lot of tens of millions of years. That is nothing wanting a miracle.
Purer carbon seed & close to good crystalline lattice construction yield clearer & colorless diamonds. But, the circumstances wherein a diamond develops are far faraway from the perfect and sanitized circumstances of a laboratory.
At instances the crystalline construction of the diamond will get distorted by the immense stress at these depths. At different instances, the seed carbons supply will get impregnated with impurities like nitrogen, boron or hydrogen. Many a instances such components happen concurrently diamond rings.
Relying on the kind of impurity (or crystalline distortion), the ensuing diamond absorbs sure spectrums of light and displays others. We understand the colour of the diamond primarily based on the mirrored spectrum of light.
The most typical impurity ingredient discovered is nitrogen. Nitrogen atoms have an unequal variety of electrons than carbon. When each of them bond, one of many nitrogen electrons stays unattached. These free electrons in orbit across the nuclei partially soak up blue & violet light wavelengths. The wavelengths which aren’t absorbed seem yellow to the human eye thus giving the diamond its yellow coloration. Nitrogen impurities impart the yellow coloration to a diamond.
General, pure coloured diamonds are extraordinarily uncommon. Nevertheless, among the many elite group of pure coloured diamonds, yellow diamonds are the commonest. Among the many 100 largest diamonds on the earth, one third of them are yellow. Probably the most well-known being The Kimberley Octahedron, weighing large 616 carats.
Pure fancy yellow diamonds shouldn’t be confused with the clear (or white) diamonds of inferior high quality. They too, occur to seem pale yellow on account of presence of hint nitrogen impurities. The colour grades of white (clear) diamonds vary from D to Z. Grade D diamonds are the whitest/clearest and most useful, whereas grade Z are tinted with faint sickly yellow to brown and are least priceless compared.
A diamond with stronger yellow going past the Z coloration grade confers the coveted fancy yellow grade upon the diamond. Such a diamond is very wanted by the celebrities, the royalties, the style ahead, and the jewellery designers. The diamond turns into fairly costly and goes past the attain of most of us.
Because the diamonds turn into progressively darker yellow in coloration, they’re given their very own separate coloration grades like fancy light yellow, fancy yellow, fancy intense yellow and fancy vivid yellow (also called canary yellow).
Like all pure coloured diamonds, the deeper and extra intense the yellow in a yellow diamond the upper the worth of the diamond can be. A tiny.25-carat yellow diamond will be priced as excessive as 10,000 {dollars} relying on its readability and minimize. Bigger 6 carat Fancy Vivid Yellow diamonds have been bought for as excessive as $57.000 per carat.
All yellow diamonds look extra intense as soon as set in yellow gold.
Much like white diamonds, the 4C’s particularly coloration, minimize, readability and carat are the components that have to be thought of earlier than selecting a yellow diamond. With Coloured Diamonds, Readability will not be as essential as Saturation of Colour and their costs rely upon saturation of coloration. A diamond should be licensed by a gemological laboratory to be referred to as pure.
Radiant and cushion minimize work effectively with giant, yellow diamonds due to their predisposition to carry coloration effectively. Utilizing one of many spherical cuts has been recognized to decrease the depth of coloration by a full grade in sure circumstances.
The Argyle mine in Western Australia is probably the most prolific producer of yellow diamonds adopted by diamond mines in South America and South Africa. Round one in each 1000 diamonds mined is a elaborate coloured diamond.
Prevalence of a pure vivid yellow diamond is even rarer. Pure intense fancy yellow diamonds are so uncommon that the majority jewelers have by no means seen one, and may by no means personal one.