Color-zoned (sandwich) butterscotch wulfenite crystals with a partial coating of arsenian vanadinite (once called endlichite). This is hallmark Erupcion (Ahumada) Mine material with typical dolomite-calcite covered matrix. There are three or four pristine areas on the specimen that host beautiful undamaged groups of wulfenite crystals. Between them, some contact is evident, probably occurring when the specimen was cobbed away from a substantially larger rock. This was a common practice back in the 1950's when these beautiful specimens were bagged and sold by the pound. It's an interesting habit classic for one of the most unique wulfenite occurrences in the world.