Spicular Oxyde of Manganese

This modification of Manganese has a pretty appearance, forming a sort of druses in the more solid masses, especially when enlivened by little groups or mingled with the nearly white, rather pearly Carbonate of Iron, and sometimes transparent Carbonate of Lime. The Manganese has a semimetallic appearance in the mass, and breaks partly earthy, the spiculæ of a shining black; a few are magnified below to show the structure with the rhombs of Carbonate of Iron, which have a neatness in their minute granular appearance.