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.
- * The Radii in Mr. Hall’s specimen, mentioned tab. 138, are a foot long, the sides of which are divided by a double direction of curved lines crossing to a central bar, consequently circumscribing rhombic forms with two convex and two concave sides.