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Where to Find Marcasite in Minnesota

Minnesota has 5 mapped collecting spots that report marcasite, spread across 3 counties. The largest share sits in Carlton County with 3 spots. 4 of the spots are on land mapped as publicly accessible.

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Every marcasite spot we track in Minnesota

Standout marcasite spots in Minnesota

Hand-picked from the full list above, with the reason each one earns a trip.

Best counties for marcasite in Minnesota

Ranked by the number of mapped marcasite spots. County links open the full rockhounding page for that county.

Before you go

Read the marcasite identification guide so you know what a keeper looks like in the field: Marcasite in the encyclopedia.

Marcasite in Minnesota FAQ

Where can you find marcasite in Minnesota?+
The mapped spots concentrate in Carlton County, Saint Louis County, and Winona County. Every spot on this page is on the map, and each spot's own page has its coordinates and access notes.
How many marcasite spots are mapped in Minnesota?+
5 spots across 3 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.
Is it legal to collect marcasite in Minnesota?+
Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 4 of the 5 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find marcasite

More minerals to hunt in Minnesota

Hunt marcasite in Minnesota with the map in your pocket

RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.

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