cf the Pyrites. 43 



leaft holds true, that between eduction and pro- 

 duction there is a great deal of difference. 



But in order to determine, whether pyrites lodge 

 with gold ore, we muft firft afcertain the proper 

 forts of real gold- ore. For glajjy ore, copper ore, 

 and the like, which in Hungary above other ores, 

 (for infl ance, above thole of our mines) are goldifh, 

 are properly filver and copper ores, their ground- 

 fubilance confiiting of filver and copper, and their 

 gold being only incidental, feeing without difad van- 

 tage to their principal conftituent parts, the gold 

 in thefe may be little or none at all. And ihould 

 fuch be accounted gold-ores ; 'tis well known that 

 not only vcn-pyritce break on all hands of fuch 

 veins, an- that copper-ores, which are themfelves 

 pyrites ) principally affect and exhibit gold, but 

 alio that near and upon white pyrit<e we often 

 find native gold. 



Pyrites moft readily lodges near filver ores, as 

 the gL'JJy, the red and white goldifh forts, which 

 may properly be called filver ores -, yet near thefe 

 rich veins loj c s a copper rather than as an iron 



lyrius; ai\d uhere it proves the laft, as an arfe- 

 mcd\ or < ot diQi, rather than an crrdLtickfu/phur- 

 as I h ive obferved from numerous famples. 

 What . ; . le, I never obferved a native 



filver, whatever pains I took to enquire about it, 

 either on the whife, the yellowifh or yellow pyrites. 

 Two fingiL- famples only I have been fhewn, tho' 

 properly nrt referable thither \ one, a pyrues-die 

 or marcafke, traverfed by a filver wire or rather 

 a filver wire encompaffed with a pyrite: ; the other, 

 a piece of a pyrites partaking of a filver ore, of 

 thtglajfi fort, from our Cbergebur^e. The filver 

 neither lies on, noi g pws 01 t ofthcj^rft, but muft 

 needs have exift< t origmaliy, and afterwards 

 by means of the lubterraneous weather or damps 

 happened to be encompaffed by the pyrites. The 



fecond 



