Alabandite
Konaka, Azuma village, Midori city, Gunma pref., Japan
Field of view: 30 mm. Alabandite associated with quartz. The black bed with a metallic luster at the bottom is a group of fine alabandite crystals. It smells like garlic by hitting. The massive white part above alabandite is aggregate of fine quartz crystals. The pale pink parts in quartz are fine rhodonite crystals. The black crust at the top and the bottom of the specimen is manganese dioxide formed by weathering.
Recovered from a chert-hosted bedded manganese deposit subjected to Hornblende-hornfels facies contact metamorphism.
Alabandite from this location was described in 1957.