The 3, 106-carat Cullinan diamond uncovered in 1905 by Frederick Wells at the Premier Mine in Pretoria, South Africa.

FORBES: The World's Largest Diamond And Other Record-Breaking Jewelry Moments

Pieces containing seven of the nine principal stones cut from the Cullinan Diamond are reunited for the first time.

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The exhibition, which is part of this summer's annual opening of Buckingham Palace, includes a host of priceless jewelry, such as the emerald-encrusted Vladimir Tiara and two brooches set with stones from the famous Cullinan Diamond, said to be the largest rough gem-quality diamond ever found, at nearly 3, 107 carats.

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They come from as far away as Cullinan (known for its diamond mine) and Ga-Rankuwa, traveling two hours each way to work here.

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Cullinan I was the largest diamond in the world until 1987.

FORBES: The World's Largest Diamond And Other Record-Breaking Jewelry Moments

Wells presented the diamond to Sir Thomas Cullinan, who owned the mine.

FORBES: The World's Largest Diamond And Other Record-Breaking Jewelry Moments

He entrusted the cutting of the Cullinan to Joseph Asscher, head of the Asscher Diamond Company of Amsterdam.

FORBES: The World's Largest Diamond And Other Record-Breaking Jewelry Moments