mineral
Yellow Ochre
Limonite/Goethite clay mixture, FeO(OH)·nH2O
AI-generated identification · may be incorrectHardness of 1 to 5.5 on the Mohs scale, earthy yellow to brownish-yellow color, dull or earthy luster, amorphous crystal structure, specific gravity of 2.7 to 4.3.
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Physical properties
Hardness of 1 to 5.5 on the Mohs scale, earthy yellow to brownish-yellow color, dull or earthy luster, amorphous crystal structure, specific gravity of 2.7 to 4.3.
Formation & geological history
Formed through the weathering and oxidation of iron-bearing minerals in sedimentary environments over geological timescales.
Uses & applications
Used historically and presently as a natural earth pigment in paints, art, ceramics, and cosmetics.
Geological facts
Yellow ochre is one of the oldest pigments used by humans, prominent in prehistoric cave paintings dating back tens of thousands of years.
Field identification & locations
Easily identified in the field by its distinct mustard-yellow color and soft, earthy texture, commonly found in clay-rich weathering zones worldwide.
