Your answer depends on what you consider 'fine' or 'finest': colour, clarity, carat weight or cut or which of these in what kind of combination.
The diamond would be either D colour on the colourless scale, or a Fancy Intense Vivid colour if a coloured stone; internally it would be Flawless; it would have the heaviest carat weight possible for the quality and style of the cut.
Your choice.
'Rare' used to describe a natural diamond describes many diamonds. Red is generally acknowledged as the most rare natural colour in diamonds. Then, the Moussaieff Red, could be called the world's rarest diamond. You can read more about this stone, below.
The largest uncut diamond ever found is the Cullinan diamond, weighing 3,106 carats or about 1.37 pounds. It was discovered in South Africa in 1905 and was eventually cut into several smaller diamonds, the largest of which is the Great Star of Africa, weighing 530 carats.
The largest known diamond is the Cullinan diamond, which was discovered in South Africa in 1905. It weighed 3,106 carats in its rough form and produced several large diamonds, the largest of which is the Cullinan I, also known as the Great Star of Africa, which is 530.2 carats.
Since most large and valuable diamonds known today were either gifts to royalty or spoils of war -- meaning no money traded hands in exchange for the diamonds, whichever of these you choose as biggest...flawlesscolouredraw diamondwhite...is priceless.
Take your black diamond to a jeweler and ask the jeweler to use the probe to verify that the diamond is a real diamond.
INDIA .......................
Kentucky
tanzania
Kentucky
many organizations i have seen little boy scouts selling world's finest chocolate ( hint hint)
Wikipedia lists its colour as "finest white."
the red diamond
Mother Nature made the world's biggest diamond.
'Finest' is a matter of judgement. You should buy the man-made diamond that you can afford for the purpose you require. Read more, below.
The worlds strongest rock is diamond
they have one of the worlds finest hairs so they kill them but they don't know the law about that.
The Smith mountain quarries in Arkansas are famous for producing the worlds finest sharpening stones.