Small, super-bright green crystals of dioptase (they are absolutely gemmy, examined closely) on lustrous calcite rhombs, which in turn have formed on finger-like stalactites of massive calcite. (The stalactites are not complete on the ends, as they were evidently contacting the pocket wall at both ends). These "fingers" are attractively stacked in parallel. This is a very unusual, pretty and desirable Tsumeb piece! 8.5 x 6.9 x 6.5cm