Limonite
Image: <a href="//commons.wikimedia.org/wiki/User:Crisco_1492" title="User:Crisco 1492">Crisco 1492</a> (CC BY-SA 4.0)
Mineral NameLimonite
Chemical FormulaFeO(OH)·nH₂O
Mohs Hardness4
Crystal Systemamorphous
Lusterearthy
Streak Coloryellowish brown
Cleavagenone
Fractureearthy
Specific Gravity3.5
Colorsyellow-orange, greenish-brown
Transparencyopaque
Type LocalityPancuran Tujuh, near Baturraden, Purwokerto, Indonesia
Mineral GroupOxides/Hydroxides
Usespigment, minor iron ore, geothermal indicator
Associated Mineralssulfur, silica, clay minerals, pyrite
Raritycommon
Description
This image displays extensive, earthy mineral deposits showing vibrant yellowish-orange and greenish-brown coloration, with water actively flowing over and steaming from the surface.
Geological Context
These deposits are formed in a geothermal hot spring environment where iron-rich waters precipitate hydrated iron oxides upon exposure to oxygen, often accompanied by microbial activity.
