The rhodochrosite crystals on this specimen are very well-formed and lustrous, and are crystallized as sharp rhombohedrons. They sit tucked in a pocket on a matrix which includes black aegerine, white analcime, and white acmite. Sadly, MSH has been closed for collecting since the early 1990s. I collected this specimen myself in 1996 from a large pocket in the Poudrette Quarry.