The largest uncut emerald believed to have been found was in
Carnaiba, Brazil in 1974. It was an incredible 86,136-carat natural
beryl crystal. The stone was eventually valued at $1,120,080. The
largest emerald crystal ever discovered was 7,025 carats and was
found in a mine in Colombia
We need to be careful while making statements like “the largest”
First it is important to distinguish beryl from emerald. The largest
aquamarine crystal, up to this point, is 110.2 kilograms. It is
Second, quality is an important factor. For example: in 1989 a druse
was found weighing 32,750 carats. It is known as Miner’s Glory. 9000
carat of gem quality stones were obtained from it.
An important find, which may be the largest, was 140mm x 350mm
emerald crystal, found at the Sommerset mine, South Aftica. Total
weight is not known (I am not sure why), but transparent part was
24,000 carats. Material was faceted and sold for 250,000,000
French francs, which is 50,000,000 dollars and that was 1956.
The largest recorded emerald crystal is 141,000 carat found in
Brazil in 1974. But then we have stories like this
So nobody knows what is the largest emerald in the world.