Vysokýite, štěpite

Vysokýite forms very fine, light green needle-like crystals that grow together to form aggregates. The sample also contains štěpite, which forms small, tabular dark green colored crystals. Both minerals grow on a porous, gray-brown massive arsenic. The specimen comes from the Svornost mine in Jáchymov. Jáchymov is a type locality for both vysokýite and štěpite.