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Famous Diamonds in the World The Allnatt Diamond
The Allnatt Diamond
Origin of name
The Allnatt diamond obtains its name from the once owner of the diamond, Major Alfred Ernest Allnatt, who was a fighter, art connoisseur, sportsman and philanthropist.
Characteristics of the stone
The Allnatt diamond is a cushion-cut, 101.29-carat, fancy bright yellow diamond with a VS-2 clarity, as specialized by the Gemological Institute of America. Fancy vivid is the premier color rating that can be agreed to colored diamonds in the GIA color scoring scale.
Being a fancy vivid yellow diamond, the Allnatt is a Type Ib diamond, in which the strong yellow color is formed by nitrogen atoms sprinkled as single atoms in the gemstone structure. These nitrogen atoms take up observable light in the blue region of the band, causing the corresponding color of blue, which is yellow to apparent itself. Though the happening of these diamonds are just about 0.1 % of all naturally stirring diamonds and are therefore quite insufficient.
Type Ia diamonds on the additional hand, have an incidence of approximately 98 % in nature and a best part of natural diamonds be in the right place to this group. These diamonds differ from near monochrome to pale and medium yellow colors. Nitrogen particles in these diamonds are created as assemblies of 2, 3 or 4 atoms. If initiated as groups of 2 or 4 atoms they do not change the color of diamonds. Conversely if nitrogen happens as groups of 3 atoms, known as N3 centers, it can communicate a pale to medium yellow color to the diamonds, depending on the attention of the N3 centers. Generally groups of 2, 3 and 4 atoms takes place collectively in the matching crystal and such diamonds are identified as Type IaAB diamonds.
In the record of famous yellow diamonds larger than 100 carats in weight, the Allnatt diamond resides in the 28th position. However, in the whole list those scheduled as fancy vivid, canary yellow, fancy intense and all of which are Type Ib diamonds are simply a few.
History of the diamond
The early record of the diamond such as the mine of origin, country of origin, date of origin, unique owners of the diamond, etc. are not identified. But, the diamond was obtained by Major Alfred Earnest Allnatt in the early 1950s, and specialists in the trade consider that the diamond is definitely of South African source, as it stands all the characteristics of South African diamond. In detail, in the early years of diamond making in South Africa in the late 19th century, starting from the 1860s to the 1890s, diamonds formed in South Africa were mostly of different shades of yellow and occasionally brown colors were known as the Cape Series.
Last transaction and present owners of the diamond
In May 1996, the Allnatt was set up for sale at an auction performed by Christie's of Geneva. The victorious bidder at this public sale was the SIBA Corporation of Hong Kong, who acquires the Allnatt for an amount of just about $ 3.05 million. SIBA had previously in its collection of another famous diamond the Agra, which it purchased on June 20, 1990, for £ 4.07 million, also at a Christie's auction. After buying the Allnatt, the SIBA Corporation had the stone re-cut, still as a cushion-cut diamond, but the mass of the stone reduced to 101.29 carats and the color concentration was improved to fancy vivid yellow.
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