234 PHYSIOGRAPHY. 



Graphic Gold. 



Secondary surfaces of the prism vertically streaked ; M 

 fused-like ; the remaining faces smooth. 



Lustre metallic. Color pure steel-grey. Streak un- 

 changed. 



Very sectile. Hardness =1-5 . . .2*0. Sp. gr. =5-723. 



Compound Varieties. Regular composition of acicular 

 crystals, nearly at angles of 60 and 120, in one plane, 

 frequently repeated, and imparting to the whole the ap- 

 pearance of certain characters for writing. Massive : com- 

 position imperfectly columnar or granular, small, but not 

 impalpable. 



1. The present species presents a great many varieties of crystalline 

 forms, which being generally very much engaged among each other, 

 and moreover modified by regular composition, have not yet been satis- 

 factorily developed. 



Before the blow-pipe, it melts easily into a dark grey metallic globule, 

 and covers the charcoal with a white oxide, which changes into a green, 

 or bluish green, when the reduction flame is directed upon it. After 

 having continued the blast for some time, a ductile metallic metal, of a 

 light yellow color, remains. 



2. Analysis. 

 By KLAPB.OTH. 



Tellurium .... 60-00 



Gold - - - - S000 v 



Silver - - - - 1000 



It yet remains to be explained how an amalgam of the above compo- 

 sition should possess a sp. gr. of only 5-723, when the artificial prepara- 

 tion would mount as high as 10. 



3. Graphic Gold occurs at Offenbanya in Transylvania, in very nar- 

 row, but quite regular veins, which traverse porphyry, several of them 

 at a short distance from each other, and parallel. It is accompanied by 

 Native Gold and Quartz ; and is occasionally met with along with Black 

 Tellurium, at Nagyag in Transylvania. 



4. It is a valuable ore, on account of its richness in gold and silver. ' 



GRAPHITE. (See Plumbago.) 



