Cullinan mine
E655746
Cullinan mine is a famous South African diamond mine renowned as the source of some of the world's largest and most historically significant diamonds, including major stones cut from the Cullinan diamond.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Cullinan Diamond Mine | 3 |
| Cullinan mine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7295559 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Cullinan mine Context triple: [Cullinan II, origin, Cullinan mine]
-
A.
Kimberley Mine
Kimberley Mine is a famous South African open-pit diamond mine renowned as one of the earliest and largest diamond discoveries in the world.
-
B.
Mopani Copper Mines
Mopani Copper Mines is a major Zambian mining company focused on the extraction and processing of copper and cobalt.
-
C.
Haile Gold Mine
Haile Gold Mine is a historic and still-active gold mining operation in the southeastern United States, known as one of the nation’s oldest and most productive gold mines.
-
D.
Witwatersrand
Witwatersrand is a mineral-rich escarpment in South Africa, historically famous for its vast gold deposits and for giving its name to the country's currency and the University of the Witwatersrand.
-
E.
Victor Diamond Mine
Victor Diamond Mine is a remote open-pit diamond mine in northern Ontario, Canada, known as De Beers’ first diamond mine in the province and for its proximity to the Attawapiskat First Nation.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Cullinan mine Target entity description: Cullinan mine is a famous South African diamond mine renowned as the source of some of the world's largest and most historically significant diamonds, including major stones cut from the Cullinan diamond.
-
A.
Kimberley Mine
Kimberley Mine is a famous South African open-pit diamond mine renowned as one of the earliest and largest diamond discoveries in the world.
-
B.
Mopani Copper Mines
Mopani Copper Mines is a major Zambian mining company focused on the extraction and processing of copper and cobalt.
-
C.
Haile Gold Mine
Haile Gold Mine is a historic and still-active gold mining operation in the southeastern United States, known as one of the nation’s oldest and most productive gold mines.
-
D.
Witwatersrand
Witwatersrand is a mineral-rich escarpment in South Africa, historically famous for its vast gold deposits and for giving its name to the country's currency and the University of the Witwatersrand.
-
E.
Victor Diamond Mine
Victor Diamond Mine is a remote open-pit diamond mine in northern Ontario, Canada, known as De Beers’ first diamond mine in the province and for its proximity to the Attawapiskat First Nation.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
diamond mine
ⓘ
open-pit mine ⓘ |
| acquiredByPetraDiamondsYear | 2008 ⓘ |
| associatedWith |
British Crown Jewels
ⓘ
linked to:
Crown Jewels of the United Kingdom
|
| country | South Africa ⓘ |
| depthCategory | deep-level mine ⓘ |
| discoveredBy | Thomas Cullinan ⓘ |
| discoveryYear | 1902 ⓘ |
| distanceFromPretoria_km | about 40 ⓘ |
| economicImportance | major contributor to South African diamond production ⓘ |
| famousFor |
production of rare blue diamonds
ⓘ
source of some of the world’s largest rough diamonds ⓘ source of the Cullinan diamond ⓘ |
| formerlyKnownAs | Premier Mine ⓘ |
| geologicalSetting | kimberlite pipe ⓘ |
| hasMiningMethod |
open-pit mining (historical and/or partial)
ⓘ
underground mining ⓘ |
| hasOpenPit | Cullinan open pit ⓘ |
| hasUndergroundWorkings | yes ⓘ |
| historicalSignificance | site of discovery of the largest gem-quality rough diamond ever found ⓘ |
| largestRoughDiamondFoundCarat | 3106 ⓘ |
| locatedIn |
City of Tshwane Metropolitan Municipality
ⓘ
Cullinan ⓘ Gauteng ⓘ Transvaal (historical) ⓘ
linked to:
Transvaal
|
| locatedOnContinent | Africa ⓘ |
| namedAfter | Thomas Cullinan ⓘ |
| nearCity |
Pretoria
ⓘ
linked to:
Pretoria, South Africa
|
| notableFind |
Blue Moon of Josephine (rough stone source)
ⓘ
Cullinan Heritage diamond ⓘ
linked to:
Cullinan diamond
Cullinan diamond ⓘ The Cullinan Blue (rough stone source) ⓘ The Cullinan Dream (rough stone source) ⓘ The Cullinan Hope (rough stone source) ⓘ
linked to:
Cullinan diamond
The Star of Josephine (rough stone source) ⓘ |
| offers | underground mine tours ⓘ |
| openingYear | 1903 ⓘ |
| operator | Petra Diamonds ⓘ |
| oreBodyType | kimberlite pipe ⓘ |
| owner | Petra Diamonds ⓘ |
| previousOwner | De Beers ⓘ |
| product |
Type IIa diamond
ⓘ
blue diamond ⓘ diamond ⓘ |
| region |
Highveld of Gauteng
ⓘ
linked to:
Highveld
|
| sourceOf |
Cullinan I
ⓘ
Cullinan II ⓘ other major stones cut from the Cullinan diamond ⓘ |
| status | operational ⓘ |
| touristAttraction | yes ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Cullinan mine Description of subject: Cullinan mine is a famous South African diamond mine renowned as the source of some of the world's largest and most historically significant diamonds, including major stones cut from the Cullinan diamond.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Cullinan mine
linked to: Cullinan mine
linked to: Cullinan mine