Simply put, an exceptional example of nikishcherite, with a numerous small ball-like clusters of hexagonal crystals cradled in a rounded bit of matrix. It is a very sculptural piece, and certainly more interesting visually than any I have seen in the past.
This species is the iron rich analogue of shigaite, and was first described in 2001 from specimens produced during a single find that occurred in 2000. At the time, there were estimated to be fewer that 200 specimens in existence— this recent find only bumps that up by a very small number.
Virtually all of what was found in the original discovery back in 2000 were thumbnails. most without matrix. To have a specimen of this size with this much nikischerite on it is virtually unheard of.