William Henry Fitton

“ The crystals are rhomboidal prisms, of which the length is in some instances more than twice the breadth, but no acumination is observable. They are easily cut by the knife, faintly translucent, their colour yellowish-grey. Small fragments before the blowpipe appear to swell a little from the separation of the folia on the first application of the heat; they become white, and give with some difficulty a solid white enamel. The specimens to which I have access at present do not enable me to give any detail of the remaining characters. ”

“ The connection of this substance with the Andalusite of Douce is remarkable; the latter often forming the nucleus of crystals externally of four sides, sometimes filling nearly the whole of the interior, but in other specimens, forming little more than an axis, with rounded edges, and of irregular form, from which the folia of the investing talc-like substance appear to radiate. ”

“ I may mention here, that from the appearances of many specimens found in the neighbourhood of Killiney, Mr. Stephens was inclined to suppose that a connection existed between this singular species and Andalusite.
7. Pitchstone. This substance is found in a vein traversing granite, in the vicinity of Newry in the County of Down. I am indebted to Mr. Jameson of Edinburgh, for much of the following description of its external characters, as it appears there.
Its colour is intermediate between mountain and leek green. It is massive. Fracture small and not very perfect conchoidal. ”

“ Within this mountainous district, distinguished by the interesting and beautiful scenery which it presents, are found the copper mines of Cronebane and Ballymurtagh; [1] and the lead mines of Glenmalur ”