2025 Session Last amended: 1984 session

§ 1.147 — State Gemstone

Plain-Language Summary

The Lake Superior agate is the official state gemstone of Minnesota. A photograph and a sample of the agate are kept in the Office of the Secretary of State.

Practical Notes
Lake Superior agates are found throughout Minnesota, deposited by glaciers during the ice age. They are popular with rock collectors and are commonly found along Lake Superior’s shores and in gravel pits across the state.