The history of large diamonds captures the imagination, combining extreme rarity with remarkable stories of discovery, craftsmanship, and ownership. These exceptional stones often become benchmarks in the diamond world, setting records and shaping market interest for centuries.
Below is a detailed overview of the largest diamonds documented, organized to highlight key facts, dates, and figures that define their place in history.
| Name | Carat Weight | Color Grade | Current Location or Owner |
|---|---|---|---|
| Cullinan Diamond | 3106 | Colorless | British Crown Jewels, set in various regalia |
| Excelsior Diamond | 995 | Colorless to White | Unknown, likely recut and dispersed |
| Lesedi La Rona | 1111 | Colorless | Graff Diamonds, private acquisition |
| Sergio Diamond | 3167 | Carbonado | Recovered in fragments, industrial use |
| Golden Jubilee Diamond | 545.67 | Fancy Brown-Yellow | Royal Thai Museum,曼谷 |
Defining Large Diamonds
How Size Is Measured
Large diamonds are typically measured in carats, with one carat equal to 0.2 grams. The weight directly influences rarity, as finding larger rough crystals is statistically uncommon. In addition to weight, clarity, color, and cut determine the stone's value and historical significance.
The Cullinan Legacy
Discovery and Rough Weight
The Cullinan Diamond, discovered in 1905 in South Africa, weighed 3106 carats in rough form. It remains the largest gem-quality diamond ever found. The stone was named after Thomas Cullinan, the owner of the Premier Mine where it was uncovered.
Gem Cuts and Jewelry Use
After careful analysis, the Cullinan was divided into several major stones. The largest cut, the Great Star of Africa, weighs 530 carats and is set in the Sovereign's Sceptre with Cross. Several other cuts form part of the British Crown Jewels, admired by millions each year.
Other Record-Breaking Finds
Excelsior and Lesedi La Rona
The Excelsior Diamond, discovered in 1893 in South Africa, weighed 995 carats. Though smaller than Cullinan, it was once the largest known diamond until the discovery of larger stones. The Lesedi La Rona, found in 2015, weighed 1111 carats and was cut into a number of high-quality polished diamonds.
Golden Jubilee and Modern Stones
The Golden Jubilee Diamond, weighing 545.67 carats, is the largest faceted diamond in the world. It displays a distinctive brown-yellow color and is held in a prominent museum in Thailand, showcasing modern cutting techniques applied to a large rough stone.
Key Takeaways
- Large diamonds are rare due to geological conditions that produce sufficiently sized crystals.
- Record-breaking stones often originate from South African mines, where deep-level mining revealed exceptional crystals.
- Cutting decisions profoundly affect the final value, as carat retention and clarity improvements must be balanced.
- Historical large diamonds have shaped trade routes, influenced ownership patterns, and become cultural symbols.
- Modern technology allows for more precise planning, resulting in higher recovery rates from large rough stones.
FAQ
Reader questions
How was the Cullitan Diamond transported and protected after its discovery?
The Cullinan Diamond was transported from South Africa to England under tight security, disguised as an ordinary package to avoid theft. Once in London, it was presented to the British government and entrusted to skilled assayers and cutters to determine the best way to divide the stone.
What makes the Excelsior Diamond significant in diamond history?
The Excelsior Diamond was the largest known diamond for several years and brought attention to South African diamond potential. Although it was eventually surpassed in size, its discovery highlighted the region’s rich deposits and advanced mining operations.
Why was the Golden Jubilee Diamond cut in a specific shape?
The Golden Jubilee Diamond was cut to maximize its size while minimizing visible inclusions. The cushion shape with a fancy brown-yellow color allowed the cutter to preserve carat weight while improving clarity and overall visual appeal.
Where is Lesedi La Rona now and who owns it?
Lesedi La Rona was sold to Graff Diamonds and subsequently cut into several large polished stones. The finest cuts from this rough have entered private collections and museum displays, demonstrating the value of meticulous planning and execution.