Petoskey stones

E69375

fossil fossil coral gemstone rock state stone tourist attraction

Petoskey stones are distinctive fossilized coral stones, often polished as gemstones, that are especially associated with the area around Petoskey, Michigan.

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All labels observed (3)

Label	Occurrences
Petoskey stone	11
Petoskey stones canonical	3
Petoskey stone coral	1

How this entity was disambiguated

This entity first appeared as the object of triple T553759 — 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: Petoskey stones
Context triple: [Petoskey, Michigan, knownFor, Petoskey stones]

A. Tuckahoe marble
Tuckahoe marble is a high-quality white to gray dolomitic marble historically quarried in Westchester County, New York, widely used in prominent 19th-century American buildings and monuments.
B. Tura limestone
Tura limestone is a fine white Egyptian limestone historically prized for its high quality and used as the outer casing stone for major monuments such as the Great Pyramid of Giza.
C. Anston limestone
Anston limestone is a durable, fine-grained building stone from Anston in South Yorkshire, England, historically quarried for major 19th-century architectural projects.
D. Tennessee marble
Tennessee marble is a high-quality, pinkish to gray crystalline limestone from eastern Tennessee widely used as an ornamental building stone in prominent U.S. monuments and architecture.
E. Quartz
Quartz is a digital news outlet known for its global business journalism, data-driven reporting, and mobile-first storytelling.
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: Petoskey stones
Target entity description: Petoskey stones are distinctive fossilized coral stones, often polished as gemstones, that are especially associated with the area around Petoskey, Michigan.

A. Tuckahoe marble
Tuckahoe marble is a high-quality white to gray dolomitic marble historically quarried in Westchester County, New York, widely used in prominent 19th-century American buildings and monuments.
B. Tura limestone
Tura limestone is a fine white Egyptian limestone historically prized for its high quality and used as the outer casing stone for major monuments such as the Great Pyramid of Giza.
C. Anston limestone
Anston limestone is a durable, fine-grained building stone from Anston in South Yorkshire, England, historically quarried for major 19th-century architectural projects.
D. Tennessee marble
Tennessee marble is a high-quality, pinkish to gray crystalline limestone from eastern Tennessee widely used as an ornamental building stone in prominent U.S. monuments and architecture.
E. Quartz
Quartz is a digital news outlet known for its global business journalism, data-driven reporting, and mobile-first storytelling.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	fossil ⓘ fossil coral ⓘ gemstone ⓘ rock ⓘ state stone ⓘ tourist attraction ⓘ
age	about 350 million years ⓘ
associatedWith	Charlevoix, Michigan ⓘ Petoskey State Park ⓘ Traverse City, Michigan ⓘ
category	Devonian fossils ⓘ fossils of the United States ⓘ symbols of Michigan ⓘ tourist attractions in Michigan ⓘ
collectionMethod	rock hunting after storms ⓘ surface collecting on beaches ⓘ
color	gray ⓘ light brown ⓘ
commonUseLocation	gift shops in northern Michigan ⓘ
country	United States of America ⓘ surface form: United States
culturalSignificance	regional symbol of northern Michigan ⓘ
environmentOfFormation	shallow warm sea ⓘ
formedFrom	Hexagonaria percarinata coral ⓘ
fossilType	colonial coral fossil ⓘ
foundIn	Lake Michigan shoreline ⓘ Little Traverse Bay ⓘ northwestern Lower Peninsula of Michigan ⓘ
geologicalPeriod	Devonian Period ⓘ surface form: Devonian
hardness	relatively soft ⓘ
locatedInTheAdministrativeTerritorialEntity	Michigan ⓘ
material	calcite ⓘ fossilized rugose coral ⓘ
namedAfter	Petoskey, Michigan, United States ⓘ surface form: Petoskey, Michigan
officialStatus	official state stone of Michigan ⓘ
officialStatusStartDate	1965 ⓘ
pattern	hexagonal coral cell pattern ⓘ honeycomb-like appearance ⓘ
polishability	takes a high polish ⓘ
popularIn	rockhounding community ⓘ
taxonOfOrigin	Hexagonaria percarinata ⓘ
tourismImpact	attract rock collectors and tourists ⓘ
usedAs	decorative stone ⓘ jewelry material ⓘ paperweight ⓘ polished gemstone ⓘ souvenir ⓘ
visibilityWhenWet	coral pattern becomes more distinct when wet ⓘ

How these facts were elicited

Referenced by (15)

Full triples — surface form annotated when it differs from this entity's canonical label.

Petoskey, Michigan, United States → knownFor → Petoskey stones ⓘ

subject surface form: Petoskey, Michigan

Petoskey, Michigan, United States → officialCityStone → Petoskey stones ⓘ

subject surface form: Petoskey, Michigan