A superb, old-time example of the "fortification style" or galena epitaxial on galena from the famed Tri-State District. The battleship-gray, second-generation galena crystals preferentially encrust the large galena cube and give this totally incredible, herringbone pattern. Classic material from the George Feist Collection and from the much less well-known Chink Enders Mine, Picher, Oklahoma. A note on the former dealer label accompanying this specimen indicates that this piece came from an old Cornwall, England collection.