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This emerald cut was initially known as ‘step cut’ and was perfectly suited for emeralds, hence the name emerald cut. The emerald cut consists of 58 facets, 8 girdles, 25 crowns and 25 pavilions. The shapes can vary from squares to rectangles. Later this emerald cut was used while shaping hard stones and so it was also applied in case of the diamonds.
The Kimberley Diamond is very shining and has an effulgence quality as the bigger facets act as mirrors, reflecting the rays of light. Baumgold Bros. sold the stone to an undisclosed collector from Texas in 1971.
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The Kimberley Octahedral diamond was so enormous that it turned out to be the largest naturally formed octahedral diamond crystal in the world, and it was the seventh largest gem-quality rough diamond ever discovered in the world in 1964. Today it is the 14th largest gem-quality rough diamond ever discovered.
However the intense shades of yellow such as fancy intense and fancy vivid come under Type Ib, but these diamonds are very scarce constituting only about 0.1 % of all naturally occurring diamonds. The canary yellow diamonds also belong to this rare group. The remaining shades of yellow such as fancy yellow, fancy light yellow, light yellow, very light yellow, and faint yellow all belong to Type Ia, which constitute almost 98 % of all naturally occurring diamonds.
The owners of the diamond De Beers Consolidated Mines Ltd., who were aware of the rarity of this exceptional find decided to preserve it for the sake of posterity, as the chances of finding a similar diamond of such enormous size was extremely remote.