390 MINES OF SCHEMNITZ. 
CHAT. The sulphurets of silver are found both in the 
^ massive and crystallized state. In the massive state 
it is associated with white earthy pearl-spar, and 
with quartz crystals. Its association with the 
latter is so remarkable, that sometimes it appears 
upon the tops of the quartz crystals as if it had 
been fused over them ; or applied with a camel's 
hair pencil when in a moist state \ Sometimes 
they are so penetrated by black sulphuret of silver, 
as to appear of ?i jet colour: and in no other 
country are the dodecahedral crystallizations of 
quartz exhibited under such a variety of singular 
shapes and aggregations^. Native silver is found 
(1) The other minerals of Schemnitz, besides the ores of gold and 
silver, are exceedingly numerous: and among them may be mentioned, 
1. Primary crystallizations oi quartz, improperly called crystallized 
chalcedony. Such specimens are probably brought hither from 
Transylvania. 
2. Phosphates and carbonates of lead, crystallized. 
5. Red plumose hydro-sulphurets of antimony, crystallized. 
4. Primary diaphanous crystals of the sulphate of barytes. 
5. Red sulphurets of arsenic, crystallized, &c. &c. 
6. Red antimonial silver, crystallized in quartz, with the sulphurets 
oileud and iron. 
7. The white silver of Werner ; rich in gold. It is a triple sulpburct 
of lead, iron, and antimony, containing silver and gold. 
8. Beautiful diaphanous ciystals of the sulphuret of zinc, of a yellow 
tcpaz colour. 
9. Stalactite magnesian limestone, investing crystals of the sulphate 
of barytes, &c. &c. 
(2) Owing to this circumstance, Scopoli composed a work entitled 
" Crystallngraphia Hungarica," which is filled with these mineral defor- 
mities. 
