This is an exceptionally rich nelenite specimen, and an unusually beautiful example from what has become the best-of-species find.
Nelenite is a sillicate mineral that is mostly familiar to New Jersey collectors, as its type locality is in the Franklin mining area. At Huanggang, it turned up as a brown accessory that was first observed on the early yellow sphalerites. In almost all cases, it was just an extra coating, yet on this piece it takes center-stage and has greatly improved the appearance of the specimen.
Originally this was a cluster of manganocalcite rhombs. They were overgrown by a coating of brown nelenite, then a subsequent generation of manganocalcite selectively crystallized over the edges of the earlier rhombs. The result, as you can see, are brown nelenite-coated rhombs accented by faintly pink manganocalcite, with a larger central rosette.
Without a doubt, this is the best and most aesthetic nelenite specimen I have seen to date.