mineral
Martian Blueberry (Hematite Spherule)
Hematite (Fe2O3)
AI-generated identification · may be incorrectHardness of 5.5 to 6.5 on the Mohs scale, dark gray to reddish-brown color with a metallic to dull luster, botryoidal or spherical crystal habit with no distinct cleavage.
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Physical properties
Hardness of 5.5 to 6.5 on the Mohs scale, dark gray to reddish-brown color with a metallic to dull luster, botryoidal or spherical crystal habit with no distinct cleavage.
Formation & geological history
Formed in ancient aqueous environments on Mars through the precipitation of iron-rich minerals from groundwater, dating back over 3.5 billion years.
Uses & applications
Of immense scientific value for astrobiology and planetary geology studies regarding the history of liquid water on Mars.
Geological facts
Discovered in abundance by the Opportunity rover in Meridiani Planum, these spherical concretions look like scattered blueberries on the Martian surface.
Field identification & locations
Easily identifiable in the field by their distinct spherical shape and iron-oxide composition, found exclusively embedded in Martian sedimentary outcrops.
