This is the first of two extremely large and impressive "snakes" of intergrown copper crystals obtained by Gene Sensel from Werner Krauss' collection in 1962. Hauck bought the Sensel collection and kept these for himself. They are probably very old specimens, but there is no way to be sure how old or exactly which mine they came from. They are complete on both sides and all around; and are very hefty and impressive in person. For the size, this is an extremely elegant specimen too, with none of the uusual matrixy-ugly-included portions common in so many large coppers. This one is more massive and robust, and heavier, than its brother below. Its just not quite as elegant, but it IS very impressive and is in comprarison at a bargain price