Wisconsin State Rock & Mineral: Red granite, Galena (lead sulfide)

Wisconsin's state rock is red granite. Wisconsin's state mineral is galena (lead sulfide). Wisconsin's state fossil is the trilobite (Calymene celebra).

Symbol names and dates are taken from primary state sources linked below. Informal or proposed symbols are not listed unless adopted.

Granite specimen — Granite (not necessarily from Wisconsin). Photo: The stone gate, CC BY-SA 4.0, via Wikimedia Commons

State rock: Red granite

Law:: Wis. Stat. § 1.10(3)(o)
Variety:: red granite

It is a variety of granite. Granite is an igneous rock with a Mohs hardness of about 6–7 and a granular, sparkly luster, usually pink, gray, white or black.

How to identify granite →

Often confused with: Arkose, Diorite, Gneiss

Also an official symbol of: Massachusetts, New Hampshire, North Carolina, South Carolina, Vermont

Galena specimen — Galena (not necessarily from Wisconsin). Photo: Ivar Leidus, CC BY-SA 4.0, via Wikimedia Commons

State mineral: Galena (lead sulfide)

Law:: Wis. Stat. § 1.10(3)(n)

Galena is a mineral (PbS) with a Mohs hardness of 2.5–2.75 and a metallic luster, usually silvery or gray.

How to identify galena →

Often confused with: Acanthite, Bournonite, Chalcocite

Also an official symbol of: Kansas, Missouri

Trilobite specimen — Trilobite (not necessarily from Wisconsin). Photo: James St. John, CC BY 2.0, via Wikimedia Commons

State fossil: Trilobite (Calymene celebra)

Law:: Wis. Stat. § 1.10(3)(m)
Variety:: Calymene celebra

It is a kind of trilobite. Trilobite is a fossil with a Mohs hardness of about 3–4 and a dull to vitreous luster, usually black, gray or brown.

How to identify trilobite →

Often confused with: Brachiopod, Eurypterid

Also an official symbol of: Ohio, Rhode Island

Wisconsin state symbols FAQ

What is the state rock of Wisconsin?

Wisconsin's state rock is red granite (Wis. Stat. § 1.10(3)(o)).

What is the state mineral of Wisconsin?

Wisconsin's state mineral is galena (lead sulfide) (Wis. Stat. § 1.10(3)(n)).

What is the state fossil of Wisconsin?

Wisconsin's state fossil is the trilobite (Calymene celebra) (Wis. Stat. § 1.10(3)(m)).

Sources

We cite primary sources (statutes, state government pages, federal regulations, and land-manager sites). Third-party listicles are not used as citations.

Wisconsin Statutes § 1.10, State symbols — Wisconsin State Legislature (accessed 2026-10-24).

Last verified 2026-10-24. Corrections welcome: if a statute has changed, tell us and we'll re-verify.

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