cf the Pyrite s. 27 



tes 9 this circumftance cannot be deemed entirely 

 accidental, but as what defer ves our clofeft atten- 

 tion. Lead-ore, efpecially the fort called glitter, 

 (galena) is always fix-fided, partly cubical, partly 

 oblong, and never obferved of any other figure. 

 That peculiarly rare lead-ore, which being com- 

 monly whitilh, greyifh, and greenifh, holds no 

 filver, not unknown at Tfchopau, nor formerly here 

 at the Tfcherper, is always prifmatical, and often- 

 times flaky, like a /pad. Tin-ore principally mani- 

 fefts itfelf in tin-ftone, alfo in fome granates. The 

 former are moftly regular bodies enough, from ten 

 to twelve fides ; the latter are never regular, 

 but with unequal angles and fides -, fome of themare 

 pretty flat on their furface, and with angles only 

 cut a little, or often quite away, and this either 

 quite flat, or foon running into fharp points. 

 Quickfilver-ore, which is principally cinnabar, 

 has, befides its uncommon red colour, no native, 

 peculiar figure -, though quickfilver be in itfelf, 

 by means of art, transformable into a thoufand 

 ihapes : the reafon may be, our not being always 

 able to diftinguifh it in ores, or to flrip it of its 

 mafk i to me it feems very probable to lie con- 

 cealed in arfenic, and the like volatile, metallic 

 bodies. Antimony-ore greatly refembles cinnabar, 

 like it confifting of fpicula or needles j with this 

 difference, that in the latter the fpicula always run 

 parallel, but in the former they often appear like 

 radii converging to a centre. Hither alfo are re- 

 ferable, with refpect to their configuration, the 

 beautifully red, fteely-clofe cobald-blootn •> the red 

 antimony- ore j the iron-coloured, radiated wolfram 

 of Altenberg in Mifnia •, alfo another ruffet fort 

 from the fame place, which is highly arfenical, 

 and laftly, feveral bifmuth-ores , feeing fuch dif- 

 tin&ly manifeft a radiated texture. 



Precious 



