Cullinan II
E164511
Cullinan II is a large, cushion-cut diamond from the famed Cullinan diamond, prominently set in the British Imperial State Crown as one of its principal stones.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Cullinan II canonical | 4 |
| Second Star of Africa | 2 |
| Cullinan II (Lesser Star of Africa, rough source) | 1 |
| Cullinan II diamond | 1 |
| Cullinan diamond | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1424018 — 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 II Context triple: [Imperial State Crown, containsGemstone, Cullinan II]
-
A.
Regent Diamond
The Regent Diamond is a famed 140.64-carat Indian diamond renowned for its exceptional clarity and long association with French royalty and the French Crown Jewels.
-
B.
Beryl
Beryl is a given name that can be used for people of any gender, historically more common as a female name in English-speaking countries.
-
C.
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.
-
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.
Lapis Niger
Lapis Niger is an ancient black stone shrine and inscribed pavement in Rome’s Forum Romanum, traditionally associated with early Roman religious or funerary practices and sometimes linked to the legendary king Romulus.
- 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 II Target entity description: Cullinan II is a large, cushion-cut diamond from the famed Cullinan diamond, prominently set in the British Imperial State Crown as one of its principal stones.
-
A.
Regent Diamond
The Regent Diamond is a famed 140.64-carat Indian diamond renowned for its exceptional clarity and long association with French royalty and the French Crown Jewels.
-
B.
Beryl
Beryl is a given name that can be used for people of any gender, historically more common as a female name in English-speaking countries.
-
C.
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.
-
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.
Lapis Niger
Lapis Niger is an ancient black stone shrine and inscribed pavement in Rome’s Forum Romanum, traditionally associated with early Roman religious or funerary practices and sometimes linked to the legendary king Romulus.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
colorless diamond
ⓘ
crown jewel ⓘ cushion-cut diamond ⓘ cut diamond ⓘ |
| alsoKnownAs |
Second Star of Africa
ⓘ
linked to:
Cullinan II
|
| associatedWith |
King Charles III
ⓘ
linked to:
Charles Philip Arthur George
King Edward VII ⓘ
linked to:
Edward VII
King George V ⓘ
linked to:
George V
King George VI ⓘ
linked to:
George VI
Queen Elizabeth II ⓘ
linked to:
Elizabeth II
|
| clarity | high clarity ⓘ |
| collection |
British Crown Jewels
ⓘ
linked to:
Crown Jewels of the United Kingdom
|
| colorGrade | near-colorless ⓘ |
| country | United Kingdom ⓘ |
| cutter |
Asscher Brothers
ⓘ
linked to:
Abraham Asscher
|
| cuttingCompletionDate | 1908 ⓘ |
| cuttingLocation |
Amsterdam, Netherlands
ⓘ
linked to:
Amsterdam
|
| cuttingStyle | cushion cut ⓘ |
| derivedFrom | Cullinan diamond ⓘ |
| discoveredAt | Premier Mine ⓘ |
| displayCollection |
Jewel House, Tower of London
ⓘ
linked to:
Jewel House
|
| displayLocation | Tower of London ⓘ |
| facetStyle | brilliant facets ⓘ |
| gemType | diamond ⓘ |
| giftedBy | Transvaal Colony government ⓘ |
| giftedTo |
King Edward VII
ⓘ
linked to:
Edward VII
|
| heldInTrustFor | the nation ⓘ |
| historicalEra | Edwardian era ⓘ |
| material | diamond ⓘ |
| mineLocation | Cullinan, Gauteng, South Africa ⓘ |
| notableFor |
being one of the largest cut diamonds in the world
ⓘ
being the second-largest stone cut from the Cullinan diamond ⓘ |
| origin | Cullinan mine ⓘ |
| owner |
The Crown Estate
ⓘ
linked to:
Crown Estate
|
| parentStoneDiscoveryDate | 1905 ⓘ |
| parentStoneWeight | 3,106 carats ⓘ |
| partOf |
Cullinan diamond
ⓘ
linked to:
Cullinan II
|
| positionInCollection | principal stone of the Imperial State Crown ⓘ |
| rankBySizeFromCullinan | second largest ⓘ |
| setIn | Imperial State Crown ⓘ |
| settingType | mount in front of the Imperial State Crown ⓘ |
| shape | rectangular cushion ⓘ |
| symbolizes |
British monarchy
ⓘ
royal authority ⓘ |
| usedBy | British monarch ⓘ |
| usedIn | British coronation ceremonies ⓘ |
| weight |
317.4 carats
ⓘ
63.48 grams ⓘ |
| yearGivenToBritishCrown | 1907 ⓘ |
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 II Description of subject: Cullinan II is a large, cushion-cut diamond from the famed Cullinan diamond, prominently set in the British Imperial State Crown as one of its principal stones.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Cullinan II
linked to: Cullinan II
linked to: Cullinan II
linked to: Cullinan II
subject linked to:
Cullinan diamond
linked to: Cullinan II