You can review the list, below, of named diamonds, none with the exact carat weight you describe, and documentation of the fact that a 99 carat diamond is not quite the world's largest.
The Cullinan Diamond, found in RSA in 1906, weighing more than 3,000 carats as a rough stone, remains today as the largest rough diamond ever found anywhere.
The Cullinan Diamond was found by a miner who took it to his supervisor for examination in 1905. The miner's name was Thomas Evan Powell and the supervisor's name was Frederick Wells. At more than 3,000 carats, it remains the largest diamond ever found. It fit into the palm of a grown man's hand, and weighed about one and one-third pounds.
'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 Hope Diamond is a blue diamond.
There are two scepters used in the British Coronation ritual. From Wikipedia: "The Sceptre with the Cross was made in 1661, and is so called because it is surmounted by a cross. In 1910, it was redesigned to incorporate the Cullinan I, also known as the Great Star of Africa, which at over 530 carats (106 g) is the second largest cut diamond in the world after The Golden Jubilee."
The 203.04-carat flawless De Beers Millennium Star,UpdateThe Millenium Star was available for viewing at the Smithsonian Natural History Museum in 2003, but has since been returned to De Beers.The largest cut diamond permanently on display there is the 42-plus carat blue diamond, The Hope diamond.
When you own a diamond of this carat weight, you can name it whatever you like.
Hope Diamond
paragon. you doing the telegraph crossword too?
canada
siberia
Horizons
greenland
The worlds largest bony fish is the Actinoptergyii.
Avenida 9 de Julio is the worlds LARGEST road. Only LARGEST. not WIDEST. Avenida 9 de Julio is the worlds LARGEST road. Only LARGEST. not WIDEST.
Pacific Ocean.
Aurochs