Silver, Arsenopyrite, Argentite

This mass of dendritic silver crystals on rock matrix has has some of the calcite removed to reveal sharp silver crystals that are coated more or less with tiny, sparkling, metallic arsenopyrite crystals. Some of the silver crystals are coated thickly while others have no arsenopyrite on them. Also some sharp dark-grey, cube-octahedral, argentite crystals on the silver. Rich!