Rocks & minerals reported in Michigan
19 rocks, minerals, gemstones, and fossils reported across 22 mapped rockhounding spots in Michigan. Each entry links to a field-ID guide; the state-specific links open the list of spots known to produce that material in Michigan.
Most-reported in Michigan
Ranked by the number of Michigan spots in this dataset that mention each material.
Petoskey Stonescommonfossil · Mohs 3-4gray, brown, tan
Chalcedonycommonmineral · Mohs 6.5-7white, gray, blue
Jaspercommonmineral · Mohs 6.5-7red, yellow, brown
Keweenaw Agatecommonmineral · Mohs 6.5-7red, orange, white
Adulariacommonmineral · Mohs 6colorless, white, pale yellow
Chertcommonmineral · Mohs 6.5-7white, gray, brown
Hematitecommonmineral · Mohs 5.5-6.5steel-gray, black, reddish-brown
Quartzcommonmineral · Mohs 7colorless, white, gray
Thomsoniteuncommonmineral · Mohs 5-5.5white, pink, green
Agatecommonmineral · Mohs 6.5-7white, gray, blue
Carneliancommonmineral · Mohs 6.5-7red, red-orange, brownish-red
Pyritecommonmineral · Mohs 6-6.5brass-yellow, pale-gold
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