Largest Rough Diamonds Ever Found

The largest gem-quality rough diamonds ever recovered, by carat weight. South Africa's 1905 Cullinan remains the biggest at 3,106.75 carats, while a wave of enormous stones from Botswana's Karowe mine now fills most of the rest of the list.

About This Dataset

Largest Rough Diamonds Ever Found
The largest gem-quality rough diamonds ever recovered, by carat weight. South Africa's 1905 Cullinan remains the biggest at 3,106.75 carats, while a wave of enormous stones from Botswana's Karowe mine now fills most of the rest of the list.
✨ AI Insight

The Cullinan (3,106.75 carats) has stood unbeaten for over a century and still dwarfs the field by more than 600 carats over the 2024 Motswedi (2,492). What stands out is geography and timing: every other stone in the top eight came from Botswana, and five of them were unearthed between 2019 and 2025. That surge reflects modern XRT sorting technology at the Karowe mine, which detects giant crystals before they are shattered by crushing. Below the two multi-thousand-carat leaders the list settles into a 1,098-2,036 carat range, showing that while thousand-carat finds are now almost routine, matching Cullinan's scale remains vanishingly rare.

Source:  Wikipedia - List of Largest Rough Diamonds

Key Findings

Auto-computed highlights from this dataset

🏆
Cullinan (South Africa, 1905) leads with 3,107 in All Time.
📊
Average value in All Time: 1,781  ·  median: 1,617.
↔️
Gap in All Time: Cullinan (South Africa, 1905) is 2.8× larger than Unnamed 1,098 ct (Botswana, 2021).

Largest Rough Diamonds Ever Found

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Data Insights

Numbers, trends & sources behind this chart

Admin
⬡
Data Points
8
8 categories  ·  1 year
↑
Top Value
3,106.75
Cullinan (South Africa, 1905)
Rough Weight (carats) · All Time
◈
Metrics
1
Rough Weight (carats)
◷
Period
All Time
Single year snapshot

Category Rankings

Rough Weight (carats) · All Time

# Category All Time
🥇 Cullinan (South Africa, 1905) 3,106.75
🥈 Motswedi (Botswana, 2024) 2,492
🥉 Unnamed 2,036 ct (Botswana, 2025) 2,036
4 Sewelô (Botswana, 2019) 1,758
5 Unnamed 1,476 ct (Botswana, 2025) 1,476
6 Unnamed 1,174 ct (Botswana, 2021) 1,174
7 Lesedi La Rona (Botswana, 2015) 1,111
8 Unnamed 1,098 ct (Botswana, 2021) 1,098
Statistical Summary — Rough Weight (carats) · All Time
3,106.75
Maximum
1,098
Minimum
1,781
Average
1,617
Median

What This Data Shows

Auto-generated trend summaries per category

→
Cullinan (South Africa, 1905)
Recorded 3,106.75 Rough Weight (carats) in All Time.
Source
→
Motswedi (Botswana, 2024)
Recorded 2,492 Rough Weight (carats) in All Time.
Source
→
Unnamed 2,036 ct (Botswana, 2025)
Recorded 2,036 Rough Weight (carats) in All Time.
Source
→
Sewelô (Botswana, 2019)
Recorded 1,758 Rough Weight (carats) in All Time.
Source
→
Unnamed 1,476 ct (Botswana, 2025)
Recorded 1,476 Rough Weight (carats) in All Time.
Source
→
Unnamed 1,174 ct (Botswana, 2021)
Recorded 1,174 Rough Weight (carats) in All Time.
Source
→
Lesedi La Rona (Botswana, 2015)
Recorded 1,111 Rough Weight (carats) in All Time.
Source
→
Unnamed 1,098 ct (Botswana, 2021)
Recorded 1,098 Rough Weight (carats) in All Time.
Source

Full Data Table

8 records across 1 year

✓ 8 sourced
Category Metric All Time Source
Cullinan (South Africa, 1905) Rough Weight (carats) 3,106.75
Motswedi (Botswana, 2024) Rough Weight (carats) 2,492
Unnamed 2,036 ct (Botswana, 2025) Rough Weight (carats) 2,036
Sewelô (Botswana, 2019) Rough Weight (carats) 1,758
Unnamed 1,476 ct (Botswana, 2025) Rough Weight (carats) 1,476
Unnamed 1,174 ct (Botswana, 2021) Rough Weight (carats) 1,174
Lesedi La Rona (Botswana, 2015) Rough Weight (carats) 1,111
Unnamed 1,098 ct (Botswana, 2021) Rough Weight (carats) 1,098

Data Sources & References

All external sources cited in this dataset

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