Arthur Aikin,
On Witherite found in Shropshire
(1817)
“ The colour of the rock where it has not undergone decomposition, is bluish or greyish black, probably from a mixture of carbon, for by exposure to the air it passes to a pale yellowish-grey, with a few spots of oxide of iron. ”
Arthur Aikin,
On Witherite found in Shropshire
(1817)
“ The colour of the witherite is white with the slightest possible, if any, tinge of yellow: its fracture is broad striated approaching to strait-foliated: it is for the most part massive. I have seen only a single specimen that presented any indications of a regular crystalline form. In other particulars it agrees with the usual descriptions of this substance. The Anglesark witherite has been analysed by Klaproth, and besides carbonate of barytes appears to contain above two per cent. of carbonate of strontites, and a scarcely appreciable quantity of oxide of copper. ”
Arthur Aikin,
On Witherite found in Shropshire
(1817)
“ In some parts there is a saalbande or sticking of grey clay an inch or two in thickness, and here the vein is the least productive; in other parts the rock is hardened by an infiltration of quartz, and these are uniformly found to be the most productive. There is no regularity in the arrangement of the contents of the vein, but generally the galena occupies the sides, and the sparry veinstones the centre. ”
