Tephroite

Field of view: 30 mm. Tephroite associated with rhodonite. The massive grayish-green parts with a greasy luster at the right are aggregate of fine tephroite crystals. The massive grayish-brown parts in tephroite are aggregate of fine alleghanyite. The coarse pink parts with a vitreous luster at the left are rhodonite. The masse pale pink parts are aggregate of fine rhodochrosite crystals.

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

Tephroite from this location was described in 1954.