Stuart Sapphire
E164840
The Stuart Sapphire is a historic blue sapphire of royal provenance, prominently set in the British Imperial State Crown.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Stuart Sapphire canonical | 2 |
| St Edward's Sapphire | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1424021 — 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: Stuart Sapphire Context triple: [Imperial State Crown, containsGemstone, Stuart Sapphire]
-
A.
Sapphire
Sapphire is an American author best known for her novel "Push," which was adapted into the acclaimed film "Precious."
-
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.
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.
-
D.
Black Prince's Ruby
The Black Prince's Ruby is a famous large red spinel, long mistaken for a ruby, that has adorned the British royal regalia for centuries and now prominently decorates the Imperial State Crown.
-
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: Stuart Sapphire Target entity description: The Stuart Sapphire is a historic blue sapphire of royal provenance, prominently set in the British Imperial State Crown.
-
A.
Sapphire
Sapphire is an American author best known for her novel "Push," which was adapted into the acclaimed film "Precious."
-
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.
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.
-
D.
Black Prince's Ruby
The Black Prince's Ruby is a famous large red spinel, long mistaken for a ruby, that has adorned the British royal regalia for centuries and now prominently decorates the Imperial State Crown.
-
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 (46)
| Predicate | Object |
|---|---|
| instanceOf |
blue sapphire
ⓘ
historic gemstone ⓘ royal jewel ⓘ |
| acquiredBy |
King George III of the United Kingdom
ⓘ
linked to:
George III of the United Kingdom
|
| acquisitionMethod | purchase from Cardinal York ⓘ |
| associatedDynasty | House of Stuart ⓘ |
| associatedMonarch |
King George V
ⓘ
linked to:
George V
Queen Elizabeth II ⓘ
linked to:
Elizabeth II
Queen Victoria ⓘ |
| associatedObject |
Imperial State Crown of the United Kingdom
ⓘ
linked to:
Imperial State Crown
|
| associatedWith |
Cardinal York (Henry Benedict Stuart)
ⓘ
linked to:
Henry Benedict Stuart
James Francis Edward Stuart ⓘ James II of England ⓘ King Charles II of England ⓘ
linked to:
Charles II of England
|
| collection |
Jewel House, Tower of London
ⓘ
linked to:
Jewel House
|
| color | blue ⓘ |
| country | United Kingdom ⓘ |
| culturalSignificance | symbol of continuity between the Stuart and Hanoverian-British monarchies ⓘ |
| cut | cabochon cut ⓘ |
| displayStatus | on public display with the British Crown Jewels ⓘ |
| era | 17th century ⓘ |
| famousFor | its size, color, and royal history ⓘ |
| gemType | sapphire ⓘ |
| hardness | Mohs hardness 9 (as corundum) ⓘ |
| heritageStatus | national treasure of the United Kingdom ⓘ |
| inscription | no known inscription on the stone itself ⓘ |
| legalOwner | monarch of the United Kingdom in right of the Crown ⓘ |
| locatedIn | Tower of London ⓘ |
| material | corundum ⓘ |
| namedAfter | House of Stuart ⓘ |
| notableFeature |
historic association with the exiled Stuart claimants to the British throne
ⓘ
prominent placement in the Imperial State Crown ⓘ |
| owner |
The Crown
ⓘ
linked to:
the Crown
|
| partOf |
British Crown Jewels
ⓘ
linked to:
Crown Jewels of the United Kingdom
Imperial State Crown ⓘ |
| positionInImperialStateCrown | back of the Imperial State Crown ⓘ |
| previousPositionInImperialStateCrown | front of the Imperial State Crown ⓘ |
| provenance |
Stuart royal family
ⓘ
linked to:
House of Stuart
|
| replacedBy | Cullinan II diamond at the front of the Imperial State Crown ⓘ |
| security | kept in secure vaults at the Tower of London when not on display ⓘ |
| setting | gold setting in the Imperial State Crown ⓘ |
| shape | oval ⓘ |
| transparency | transparent to translucent ⓘ |
| usedFor | ceremonial occasions of the British monarchy ⓘ |
| usedIn |
British coronation regalia
ⓘ
linked to:
Imperial State Crown
|
| weight | approximately 104 carats ⓘ |
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: Stuart Sapphire Description of subject: The Stuart Sapphire is a historic blue sapphire of royal provenance, prominently set in the British Imperial State Crown.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Stuart Sapphire