Inverse crystallized Carbonate of Lime

This is nearly the same formation as the last, the crystallization radiating from various centres with the terminations meeting^*: they however are in more determined columns of three sides, and the pyramids at first sight appear more simple: however, there is a tendency to double each face of the pyramid, making, like the metastatique, a six-sided pyramid. This is one of the darkest-coloured ones of this nature.