The mineral before us is one of those new substances named by Werner a little before his lamented death, it appears to be perfectly distinct from every other; it consists of brilliant fragile acicular crystals arranged in stelliform groups, more or less compact, in the hollows and fissures of a rock composed of Quartz and Chlorite; it is accompanied by Fluor and phosphate of Lime. It is extremely brittle and softer than glass, before the blowpipe it swells and melts with ebullition into a dark brown globule. Its colour varies from nearly white to a deep straw yellow; its most common colour is pale straw, from which circumstance it has been named from Καρφος.

From Mr. Heuland’s cabinet.