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Name: |
goethite |
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Class: |
Oxide/Hydroxides |
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Chemistry: |
FeOOH Hydrous Iron Oxide |
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Color(s): |
brown, yellow, gray, metallic |
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Hardness: |
4 - 5.5 |
SpecGrav: |
3.8 - 4.3 |
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Fracture: |
uneven |
Cleavage: |
complete |
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Crystal: |
Orthorhombic (often globular masses, prismatic or tabular crystals.) |
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Envronment: |
found in oxidized zone of sulfide ore deposits |
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Association: |
hematite, pyrite, calcite, quartz, lepidocrocite |
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Locals: |
| Alabama, Michigan, Colorado, USA | Germany | England | France | Canada | |
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Misc: |
Named in honor of the German poet, Johann Wolfgang von Goethe. Goethite is the major constituent of rust, and an important ore of iron. It is also the primary constituent of limonite, which is a catchall name for a variety of mixed iron oxides. |
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