Where is Limonite found?
FeO(OH)·nH2O
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Open the appLimonite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Limonite
Mesabi Range, Minnesota, USA
Known for extensive iron ore deposits, including significant limonite occurrences in the oxidized zones.
Krivoy Rog, Ukraine
Major iron ore district with abundant limonite as a weathering product.
Lorraine, France
Historically significant iron ore region where limonite was a primary ore.
Various bog iron deposits worldwide
Found in swamps, bogs, and shallow lakes where iron-rich groundwater precipitates hydrated iron oxides.
Lateritic soils in tropical and subtropical regions
Common component of highly weathered soils, often forming iron-rich crusts.
Collecting tips
- Look for Iron-Rich Environments. Search in areas with known iron ore deposits, gossans (weathered sulfide deposits), or where iron-bearing rocks are exposed to weathering.
- Identify Bog Iron Deposits. Explore bogs, swamps, and shallow lake beds, particularly in temperate regions, where limonite can precipitate as concretions or layers.
- Check for Yellow-Brown Staining. Limonite often forms as a stain or coating on other rocks and minerals, indicating the presence of iron oxidation.
- Observe Earthy Texture. Its characteristic earthy, dull luster and often porous or concretionary forms are key identifiers.
Quick Check
- Color:
- Yellow-brown to dark brown
- Luster:
- Earthy, dull
- Streak:
- Yellowish-brown
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