A cluster of opaque dolomite crystals (not calcite; verified by sluggish reaction with dilute hydrochloric acid) to 2.9 cm is associated with abundant, transparent gypsum needles to about 1 cm and nondescript, brassy to dull chalcopyrite. The dolomite has overgrown a matrix rich in massive sphalerite, and displays red fluorescence under both longwave UV (blacklight) and shortwave UV (so this is manganoan dolomite...?). Very nice condition.