underthescopeminerals:

Fedotovite

Locality:

Great Fissure eruption (Main Fracture), Tolbachik volcano, Kamchatka Oblast’, Far-Eastern Region, Russia

Many hexagonal tabular green crystals of fedotovite. Mineral found in sublimates around fumaroles. Usually forms crusts of pseudohexagonal flakes.

 Photo Serge Lavarde