Big quartz cluster with paper calcite and sphalerite from Bulgaria 1428g

A large natural quartz cluster with paper calcite and sphalerite from Bulgaria, measuring 180x107x73mm and weighing 1428g. The piece features a broad quartz matrix with the unusual "paper calcite" habit - very thin, flat calcite blades growing across the quartz surface - alongside sphalerite with resinous grey luster. The paper calcite adds a delicate, layered texture to what is otherwise a bold, large specimen.

Paper calcite is an uncommon calcite crystal habit, and its combination with quartz and sphalerite in a large display specimen makes this a notably varied piece from Bulgaria. Large quartz specimen Bulgaria, paper calcite crystal, sphalerite quartz cluster, Bulgarian mineral display piece, unusual calcite habit, large crystal cluster natural stone, untreated mineral.