Paukkajanvaara mine, Joensuu, North Karelia, Finland

Uraninite and secondary alteration products Weight: 213 Cleaned with brush and boiling water Uranium ore chunk with layers of uraninite between iron rich host rock. Uranophane alteration products on surface.

Yellow uranophane crusts and crystals.

© Heyninck A

Crystal group of uranophane from Paukkajanvaara Mine.

Parallel growth uranopahane crystal group.

Black uraninite and yellow uranophane in quartz and sericite matrix.

Yellow uranophane in quartzite.

Bright orange aggregate of platy crystals.

Orange tyuyamunite with yellow uranophane.

An aggregate of orange platy crystals.

Paukkajanvaara uranium mine 1961.

© Ilkka Laitakari, Geologian tutkimuskeskus