Rammelsbergite with Erythrite and Stephanite

An interesting combination of Rammelsbergite with Erythrite and Stephanite from Medenec in the Krušné Hory Mountains of Bohemia, Czech Republic.  The Rammelsbergite, a nickel arsenide, forms a roughly 4 x 2 cm dendritic porous mass of crystals, each averaging 1 mm, all of mid to light grey tin white with a micro-hackly texture.  The Rammelsbergite stands on a matrix of glassy Calcite forming a mound of tiny crystals at the front and a thin plate across the back.  A few individual spherules of crystallised bubble gum pink Erythrite are dusted over the specimen and along the interface between the Calcite and Rammelsbergite sit several small clusters of well-developed Stephanite crystals.  This small miniature is mounted vertically on a clear, colourless acrylic base.