Wulfenite, (w. Dolomite and Rosasite)

Chemistry: PbMoO4
Size: 56 mm
Owner: Mariusz Oleszczuk
Photographer: Mariusz Oleszczuk

A large tabular crystal of orange-brown wulfenite (40mm diagonal) is overgrown by creamy-white dolomite and blue-green rosasite (XRD verified).  The rosasite forms a loose, arborescent aggregate of botryoidal structures, some of which are hollow (see close-up photo; FOV c. 30 mm); it is possibly pseudomorphous after native copper (?) or, perhaps, copper with cuprite (?).