Tavagnascoite
Espérance tunnel, Tavagnasco Mines, Tavagnasco, Metropolitan City of Turin, Piedmont, Italy
Sony Nex 7, bellows, Motutoyo M Plan 20x, aperture, Raynox DCR-250 retro, THK linear actor, stack shot control.
It is obvious that the white aggregates are pseudomorphs of a previous mineral phase. Beppe Finello has some concerns, however the BSE images show sulfide crystals as basis of Tavagnascoite. A further alteration shouldn't be excluded ...
© Stephan Wolfsried 12/2015