We have seen many mimetites from this locale, and many calcites, but I cannot recall seeing such a combination piece with large robust calcites sprouting like mushrooms atop. From the bottom, you can see that the mimetite encrusts a calcite stalactite, and then the large calcites atop came later. The whole specimen exhibits a tree-like or mushroom pattern. The mimetite at the base of the piece is sparkly and bright goldenrod-yellow, not the brown color as are so many mimetites from this locality. Complete all around.