Missouri State Rock & Mineral: Mozarkite, Galena

Missouri's state rock is mozarkite, adopted in 1967. Missouri's state mineral is galena, adopted in 1967. Missouri's state fossil is the crinoid (Delocrinus missouriensis), adopted in 1989.

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

Chert specimen — Chert (not necessarily from Missouri). Photo: Unknown, Public domain, via Wikimedia Commons

State rock: Mozarkite

Adopted:: 1967
Law:: RSMo 10.045
Variety:: mozarkite

It is a variety of chert. Chert is a sedimentary rock with a Mohs hardness of about 6.5–7 and a waxy to dull luster, usually gray, black, brown or white.

The Missouri Geological Survey describes it as a variety of chert found only in Missouri, most often in Benton County.

How to identify chert →

Often confused with: Agate, Flint, Jasper

Also an official symbol of: Ohio

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

State mineral: Galena

Adopted:: 1967
Law:: RSMo 10.047

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, Wisconsin

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

State fossil: Crinoid (Delocrinus missouriensis)

Adopted:: 1989
Law:: RSMo 10.090
Variety:: Delocrinus missouriensis

It is a kind of crinoid. Crinoid is a fossil with a Mohs hardness of about 3 and a dull luster, usually gray, white or brown.

How to identify crinoid →

Often confused with: Blastoid, Fusulinid, Horn Coral

Missouri state symbols FAQ

What is the state rock of Missouri?

Missouri's state rock is mozarkite, adopted in 1967 (RSMo 10.045).

What is the state mineral of Missouri?

Missouri's state mineral is galena, adopted in 1967 (RSMo 10.047).

What is the state fossil of Missouri?

Missouri's state fossil is the crinoid (Delocrinus missouriensis), adopted in 1989 (RSMo 10.090).

Sources

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

State Geologic Symbols — Missouri Department of Natural Resources (accessed 2026-10-24).
Revised Statutes of Missouri § 10.090, State fossil — Missouri Revisor of Statutes (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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