248 



METALS. 8i. Aurum. 



Aurum antimon. mineral. Born, ind.fofi, i. p. 68. 

 Found near Deutfchltpfch in Hungary:, and near Nagyag in fraft' 

 jyhania, confitting of gold alloyed with common antimony; 

 its furface is lometimes Itriate like the web of a feather. 



rufescim. Of a reddifh colour, emitting fulphurous flames when 



heated to whitenefs. 



Aurum pfeudogaljEna. Born, ind, fofs, 1. p.6c), 



Pfeudogalena aurifera. Wall, fyst. z. p. 357. ». 4. 



Found near Nagyag in Tranjylvania, lamellar, of a femimetal- 



lic luflre, and contains zinc, oxyde of iron and fulphur bc- 



fides the gold. 



dnereum, Hardifh, brittle, compa6l, of a yellowifh fie el -col our, 

 emitting fulphurous flames and arfenical fumes when 

 heated to whitenefs. 

 Aurum minera argenti. Born, tnd.fofs. i. ^,68. 

 • Bilmuthic gold, SchmeiJJer miners 2. p 28. 

 Found near Nagyag in Hranfylvania^ and refembles in appear- 

 ance grey copper-ore: it contains an alloy of fllver mixed 

 with fu!phur and arfenic. 



nlbldum^ Whitifn, yellowifh internally, fibrous, emitting fulphur- 

 ous flames and arfenical fumes when heated to white- 

 nefs. 

 Arfenicated gold, Schmetfer mineral, z, p. ^o* 

 Aurum ferro et arfenico. Born, ind fojs. i /. 69. 

 Found in the gold mines of Nagyag in 1ranfyl<vania-, and con- 

 tains befides the gold, fulphur, arfenic and iron: the fulphur 

 and arfenic may be feparated by heat, the iron by muriatic 

 and the gold by nitro-muriatic acid. 



Htirescens Of a greenifh-gold colour and rather obfcure luflre, and 

 minutely granular texture. 



Guncr goldkies. Bindh. jchr. herl. natur. 4. p. 396. 



Found near Nagyag in Trarjyl<uania imbedded in quartz, and 

 bcfides the gold contains fulphur, iron, copper and manga- 

 nefe. It is more than probable that fomeof ihefe lall fpecies 

 are ores of Tellurium. 



Of a gold-yellow colour, emitting fulphurous flames when 

 fyrlticorum. made white hot. 



Aurum pyrita. Syst. nat. xii. 3. p. 152. ». 2. 

 Aurum fuiphure et ferro. WalL Jyli. 2.^. 556. «. 2. 

 Gold pyrites. Schme'rJJer miner* 2* />. 29. 



