For gemologists, the biggest diamonds in the world aren’t just portable pieces of extreme wealthโtheyโre like windows into the Earth’s deeper mantle.
These are known as โCLIPPIRโ diamonds. The acronym stands for โCullinan-like, Large, Inclusion-Poor, Pure, Irregular, and Resorbed.โ These raw gems come from depths of 224 to 466 miles (yep, miles!) beneath the Earth, carrying messages in the form of mineral inclusions from deep below the rigid tectonic plates to the surface, like dazzling messengers from a crazy deep coal mine.
For most of us, though, these remarkable stones are jaw-dropping for more obvious reasons: their massive size and their almost priceless value.
Whatโs even more fascinating than their sheer size and worth is that big diamonds are being found more often these days. The jewelry trade publication JCK put it simply: โItโs because technology has made it easier to locate them.โ
Here, weโre showcasing the 10 largest diamonds ever discovered, listed in descending order. Not all are CLIPPIRs, but theyโre all incredibly impressiveโuntil, of course, something even bigger is found.
1. The Cullinan Diamond: A 3,106-Carat Marvel
Let’s talk about the Cullinan Diamond, tipping the scales at a whopping 3,106 carats. This isn’t just any diamond; it’s the largest gem-quality rough diamond ever discovered. It was unearthed on January 26, 1905, at the Premier No. 2 mine in Cullinan, South Africa. The diamond got its name from Thomas Cullinan, who was the chairman of the mining company back then.
This gem is celebrated for its stunning blue-white color and incredible clarity. The Asscher family of Amsterdam, who were the top diamond cutters of their time, took on the monumental task of cutting the stone. The process wasn’t just a walk in the park. It was more like a Herculean effort.
The Royal Collection Trust, which looks after Britainโs Royal Collection (including the Crown Jewels where pieces of the Cullinan reside), gives us a glimpse into the intense process on their website. They share that preparing the groove for the cleaving knife alone took four days.
And get thisโthe first blow broke the knife, not the diamond! For the next eight months, three dedicated men worked 14 hours a day to transform the original diamond into nine large stones. Each of these stones was numbered I to IX, a naming convention that persists to this day. They also produced 97 small brilliants and some unpolished fragments from the original diamond.
So, the Cullinan Diamond isnโt just a gem; it’s a piece of history shaped by sheer perseverance and skill.