Manganosite

Field of view: 10 mm. Granular manganosite. The green grains are manganosite. The massive brown parts around manganosite are aggregate of fine hausmannite crystals.

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

Manganosite from this location was described in 2003.

Field of view: 50 mm. Manganosite associated with hausmannite. The green parts are aggregate of fine manganosite crystals. The massive brown beds around manganosite are fine aggregate of hausmannite. The massive pale pink parts around hausmannite are rhodonite. The thin black bed below the center manganosite-hausmannite groups is aggregate of fine jacobsite crystals. The white parts and pale brown parts at the upper half are the host chert.