106 
LONG 
GALLERY. 
Nat. Hist. 
triple sulphuret of bismuth, lead, and copper.— Sul¬ 
phur et of copper and tin , or tin pyrites.—The remain¬ 
der of this case is taken up by a considerable suite of 
specimens of sulphuret of mercury, divided by Werner 
into dark-red cinnabar (by far the most common variety), 
and the bright-red cinnabar (native Vermillion, much 
esteemed by painters); the hepatic mercurial ore from 
Idria, compact and slaty: the same with petrifactions 
(coral ore). 
Case 10. Sulphuret of silver , vitreous silver, or silver 
glance, massive, crystallized, and in other external forms, 
among which are the laminar and capillary: the black 
silver ore appears to be a pulverulent variety of this 
species;—-flexible silver glance.— Sulphuret of antimony, 
or grey antimony, compact, foliated, radiated, and 
plumose: the more remarkable among these are the 
specimens of crystallized antimony in splendid groups, 
especially from Transylvania; radiated grey antimony 
with barytes, realgar, &c., and the plumose, (or feather- 
ore,) some varieties of which, appearing like delicate 
wool or down, display a fine iridescent blue, yellow, and 
red tarnish: it should, however, be observed here, that 
several of the plumose varieties of grey antimony (to¬ 
gether with the jamesonite and %inkenite deposited in 
this case), are referable to the sulpho-salts in the next 
glass case. 
Case 11. Part of this case is occupied by the speci¬ 
mens of sulphuret of arsenic , viz. the yellow orpiment , 
massive and inseparable, striated, transparent laminae; 
and the red orpiment or realgar , perfectly crystallized 
and massive.—The rest of this and part of the next 
case, contain the simple and double sulpho-salts formed 
by the sulphurets of antimony and of arsenic, with 
basic sulphurets of electro-positive metals; they are 
(besides the jamesonite, zinkenite, and some varieties of 
the plumose antimony or feather-ore in Case 10)—the 
red or ruby silver ore , divided into the dark and the 
light red, both of the same crystalline forms, but in the 
latter of which sulphuret of arsenic takes the place of the 
sulphuret 
