ท้อ 2 ภาษาอังกฤษ

"Chlorite forms the characterizing ingredient in chlorite slate; it is common in Cornwall with the tin veins, constituting with quartz the rock commonly known there as killas; the ordinary name for chlorite is peach."

"Peach, which is a word used by the Cornish miners, in a generic sense, to denote all minerals of the chloritic family—and is consequently a very convenient word—seems to be essentially the "mother" of tin; but the experience of Cornwall goes to show that peach alone does not produce a permanent tin mine: an intermixture of quartz is necessary to give what miners call "strength" to the lode."

"A quartz (sparry) vein, unless accompanied by other minerals such as peach, chlorite, &c., is considered valueless as an indication of the presence of ore."