Cullinan diamond
E656914
The Cullinan diamond is the largest gem-quality rough diamond ever found, discovered in South Africa in 1905 and later cut into several famous stones set in the British Crown Jewels.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Cullinan diamond canonical | 2 |
| Cullinan diamond fragments | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7295547 — 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 diamond Context triple: [Cullinan II, derivedFrom, Cullinan diamond]
-
A.
Cullinan I
Cullinan I, also known as the Great Star of Africa, is the largest clear-cut diamond in the world and a prominent jewel in the British Crown Jewels.
-
B.
Cullinan II
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.
-
C.
Hope Diamond
The Hope Diamond is a famous deep-blue, 45.52-carat diamond renowned for its size, rare color, storied history, and legends of a curse.
-
D.
Koh-i-Noor diamond
The Koh-i-Noor diamond is a historically famous and controversial large colorless diamond of Indian origin that has passed through various royal hands and now resides in the British royal regalia.
-
E.
Orlov diamond
The Orlov diamond is a famous large Indian-origin diamond renowned for its rose-style cut and its prominent role in the Russian imperial regalia.
- 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 diamond Target entity description: The Cullinan diamond is the largest gem-quality rough diamond ever found, discovered in South Africa in 1905 and later cut into several famous stones set in the British Crown Jewels.
-
A.
Cullinan I
Cullinan I, also known as the Great Star of Africa, is the largest clear-cut diamond in the world and a prominent jewel in the British Crown Jewels.
-
B.
Cullinan II
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.
-
C.
Hope Diamond
The Hope Diamond is a famous deep-blue, 45.52-carat diamond renowned for its size, rare color, storied history, and legends of a curse.
-
D.
Koh-i-Noor diamond
The Koh-i-Noor diamond is a historically famous and controversial large colorless diamond of Indian origin that has passed through various royal hands and now resides in the British royal regalia.
-
E.
Orlov diamond
The Orlov diamond is a famous large Indian-origin diamond renowned for its rose-style cut and its prominent role in the Russian imperial regalia.
- F. None of above. chosen
Statements (60)
| Predicate | Object |
|---|---|
| instanceOf |
cut diamond
ⓘ
gem-quality diamond ⓘ historical object ⓘ rough diamond ⓘ |
| alsoKnownAs |
Great Star of Africa
NERFINISHED
ⓘ
Second Star of Africa NERFINISHED ⓘ |
| clarity | exceptional ⓘ |
| colorGrade | colorless ⓘ |
| cutBy | Asscher Brothers NERFINISHED ⓘ |
| cutInCity | Amsterdam NERFINISHED ⓘ |
| cutShape |
cushion-cut brilliant
ⓘ
heart-shaped brilliant ⓘ pear-shaped brilliant ⓘ |
| cutShape |
pear-shaped brilliant
ⓘ
square-cut brilliant ⓘ |
| cuttingCompletedInYear | 1908 ⓘ |
| discoveredBy | Frederick Wells NERFINISHED ⓘ |
| discoveredInCountry | South Africa NERFINISHED ⓘ |
| discoveredInPlace | Premier Mine NERFINISHED ⓘ |
| discoveredInProvince | Transvaal NERFINISHED ⓘ |
| discoveredInYear | 1905 ⓘ |
| discoveredOnDate | 1905-01-26 ⓘ |
| foundAtDepth | 9 meters ⓘ |
| foundOnContinent | Africa NERFINISHED ⓘ |
| namedAfter | Thomas Cullinan NERFINISHED ⓘ |
| partOf |
British Crown Jewels
NERFINISHED
ⓘ
British Crown Jewels NERFINISHED ⓘ |
| partOfCollection | British Crown Jewels (through its cut stones) NERFINISHED ⓘ |
| presentedBy | Transvaal Colony government NERFINISHED ⓘ |
| presentedInYear | 1907 ⓘ |
| presentedTo | Edward VII NERFINISHED ⓘ |
| purchasePricePounds | 150000 ⓘ |
| recordHeld | largest gem-quality rough diamond ever found ⓘ |
| setIn |
Imperial State Crown
NERFINISHED
ⓘ
Queen Mary's Crown (historically) NERFINISHED ⓘ Sovereign's Sceptre with Cross NERFINISHED ⓘ |
| soldInYear | 1907 ⓘ |
| soldTo | Transvaal Colony government NERFINISHED ⓘ |
| weightCarats |
11.5
ⓘ
18.8 ⓘ 3106.75 ⓘ 317.4 ⓘ 4.4 ⓘ 530.2 ⓘ 6.8 ⓘ 63.6 ⓘ 8.8 ⓘ 94.4 ⓘ |
| weightGrams | 621.35 ⓘ |
| yieldedFragmentsCount | 9 large stones and 96 smaller brilliants ⓘ |
| yieldedMainStone |
Cullinan I
NERFINISHED
ⓘ
Cullinan II NERFINISHED ⓘ |
| yieldedSmallerStonesCount | 96 brilliants ⓘ |
| yieldedStone |
Cullinan III
NERFINISHED
ⓘ
Cullinan IV NERFINISHED ⓘ Cullinan V NERFINISHED ⓘ Cullinan VI NERFINISHED ⓘ Cullinan VII NERFINISHED ⓘ |
| yieldedStone |
Cullinan IX
NERFINISHED
ⓘ
Cullinan VIII NERFINISHED ⓘ |
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 diamond Description of subject: The Cullinan diamond is the largest gem-quality rough diamond ever found, discovered in South Africa in 1905 and later cut into several famous stones set in the British Crown Jewels.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Cullinan diamond fragments