A cabinet specimen of quartz with manganocalcite and bits of nelenite. Not all the the small brown crystals are nelenite, but there is still a fair amount on the piece.
Even without the nelenite however, the piece is still a nice example of quartz and manganocalcite. As sometimes happens at the mine, the manganocalcite rhombs have been over grown on selective faces by a second generation of thinner manganocalcite crystals. These have in turn formed on a cluster of terminated quartz crystals.