Goethite
Sukayu hot spring
Arakawa, Aomori city, Aomori pref., Japan
Length: 40 mm. Goethite associated with hematite. Black parts are goethite. Goethite deposits layers and forms a porous aggregates. The red powdery parts in the vugs are hematite.
Recovered from a goethite-jarosite deposit formed by bacterial Fe biomineralization from Fe-Sulfate spring water. Formed in less than a million years.
Other localities
- Kobushi Mine (Pneumatolytlic Skarn, replacing Pyrite)
- Chichibu Mine (Hydrothermal Skarn, Reniform)
- Nakatatsu Mine (Hydrothermal Skarn, Reniform)
- Mikawa Mine (Hydrothermal, Acicular)
- Gunma Mine (Bog Iron, replacing Plants)
- Sukayu hot spring (Bog Iron)
- Mount Takeshi (Tuff, replacing Pyrite)