Wulfenite

From the locality in China known for its red wulfenites comes this reddish orange  densely covered specimen. I am most curious what the dendrites on the back of the specimen are, as they look like copper but that is not likely as it was an iron and manganese mine. Ex Phillip Potter

Locality: Jianshan Mine Shanshan County, Turpan, Xinjiang Uygur Autonomous Region, China. 

Composition: lead molybdate