These are classics from the heyday of uranium mining in these famous deposits, when specimens came out mainly through Belgian exploration geologists and dealers in the 1950s-1960s. This piece was sold by Belgian dealer Eric van Dievoet to Marv Rausch in 1984. It then was in the Rausch collection for 25 years until I bought the piece when it was dispersed. These used to be nicknamed "green wulfenites" for obvious reasons! Brilliant, emerald green, bladed crystals, to 2 cm in length, of metatorbernite totally cover their matrix. It is a gorgeous specimen with unusual poise and separation to the crystals, and top luster and color saturation. They simply do not make them like this anymore! Ex. Dr. Marvin Rausch collection.