There is a lot going on in this specimen.  The matrix is actually a large descloizite crystal that has been pseudomorphed by a mixture of cerussite, mimetite, wulfenite, and possibly anglesite.

Over that has grown a second generation of mimetite crystals, and 2 bright orange wulfenites to over 1 cm each. 

This is truly an exceptional miniature, and an example of material only found in Iran.