Hausmannite

Kurokawa, Hishi village, Kiryu city, Gunma pref., Japan

Field of view: 10 mm. Massive hausmannite. The dark brown part at the center is aggregate of fine hausmannite crystals. The massive grayish-green zone around hausmannite is aggregate of fine tephroite crystals. The light gray host is chert. The massive pink parts and the pink veins in chert are aggregate of fine rhodonite crystals.

Recovered from a chert-hosted bedded manganese deposit subjected to Albite-Epidote-hornfels contact metamorphism.

Hausmannite from this location was described in 1962.

Other localities

List of Japanese hausmannite localities

Taguchi Mine (Bedded Mn, AM facies)
Kiyokawa Mine (Bedded Mn, Zeo facies)
Kusama Mine (Bedded Mn, Zeo facies)
Kurokawa Mine (Mn skarn)
Mogurazawa Mine (Mn skarn)