The largest carat diamond ever found was the Golden Jubilee Diamond. It was found in 1908 and when it was cut weighed 545 carats. It is known as the Great Star of Africa.
The largest carat diamond that was ever found was found by a man named Fredrick Wells in 1905. The diamond itself was found in Pretoria, South Africa.
The biggest carat in a cut diamond is 20 carats. The largest diamond ever found was 530 carats.
Where ever you are in the world, a one carat diamond weighs one carat, or .20 grammes.
The largest carat diamond ever is the Cullinan Diamond. This diamond weights in at 3106.75 carats which is around 1.37 pounds. The biggest diamond ring however, is 150 carats.
Diamonds have been part of human history for about 6,000 years, before humans began keeping written records of alluvial diamonds. Identifying the biggest alluvial diamond ever found, then, is not possible. Probably, the first diamond found and admired was an alluvial diamond. You can read more, below.
There isn't any information on the smallest carat diamond ever sold. However, I did find the world's smallest diamond. It weighs in at 0.0003. It is being sent into the Guiness Book of World Records.
The 'costliest diamond of the world' is measured by the price paid for a diamond. Depending on your particular criteria, there are several examples.When money changes hands to represent the costliest diamond...The JCK Marketplace Web site reports that an 84-carat [faceted] diamond sold for US $16.2 million, at "... $191,980 per carat, the highest price per carat ever paid for a white diamond at auction." This auction took place in 2007.At the same auction..."An extremely rare fancy vivid blue pear-shaped diamond, weighing 4.16 cts. and mounted as a ring, ...sold for $4.7 million. The per-carat price was more than $1.1 million, making it the second highest price per carat paid for a colored diamond at auction."In 2010, Reuters reported that "Petra sets record, sells diamond for $35 million" in its headline for the sale of a 507 carat raw diamond.
It's impossible to tell the largest diamond ever used in an engagement ring, but the most costly was Beyonce's at $5 Million, given to her by Jay-Z it had an 18 Carat diamond at its centre.
THe largest diamond ever found was 3106.75 carats.
The most expensive diamond ever sold is the Pink Star, a 59.60-carat pink diamond that was sold for $71.2 million at a Sotheby's auction in Hong Kong in 2017.
According to Wikipedia: "The "Jones Diamond," also known as the "Punch Jones Diamond," "The Grover Jones Diamond," or "The Horseshoe Diamond," was an 34.48 carat (6.896 g) alluvial diamond found in Peterstown, West Virginia by members of the Jones family. It remains the largest alluvial diamond ever discovered in North America."
The largest size of a synthetic rough diamond ever made is around 46 carats.