Rocks & minerals reported in Illinois
27 rocks, minerals, gemstones, and fossils reported across 29 mapped rockhounding spots in Illinois. Each entry links to a field-ID guide; the state-specific links open the list of spots known to produce that material in Illinois.
Most-reported in Illinois
Ranked by the number of Illinois spots in this dataset that mention each material.
Geodecommonsedimentary · Mohs 7white, gray, brown
Pyritecommonmineral · Mohs 6-6.5brass-yellow, pale-gold
Calcitecommonmineral · Mohs 3white, colorless, yellow
Agatecommonmineral · Mohs 6.5-7white, gray, blue
Jaspercommonmineral · Mohs 6.5-7red, yellow, brown
Sphaleritecommonmineral · Mohs 3.5-4yellow, brown, black
Baritecommonmineral · Mohs 3-3.5colorless, white, yellow
Quartzcommonmineral · Mohs 7colorless, white, gray
Cerussitecommonmineral · Mohs 3-3.5colorless, white, gray
Chalcopyritecommonmineral · Mohs 3.5-4brass-yellow, iridescent, gold
Diamondcommongemstone · Mohs 10colorless, yellow, brown
Galenacommonmineral · Mohs 2.5lead-gray
Where in Illinois to find each
State-specific spot lists. Each link opens the Illinois subset of mapped rockhounding spots for that mineral.
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