genus of stones of the order of petrae, belonging to the class of saxa. There are two species, 1. That composed of distinct particles, found in several of the mountainous parts of Sweden. In some of these there is a predominance of quartzose particles, in others of micaceous; in which last case the stone is flatly, and easily split. 2. Granitello, composed of convoluted particles. This is met with of different colours, as whitish grey, greenish, and reddish.

Both these kinds of stone are used in building furnaces, on account of the powerful resistance they make to the fire; but the latter is preferable to the other, on account of its containing a little of a refractory clayish substance. It is likewise of great use in mills, where the fellow is a coarse sandstone.