GALLERY.] 
NATURAL HISTORY. 
49 
by reddish-brown or orange red particles of selenium;—also a medallion, 
in selenium, of its discoverer, Berzelius. 
Case 5. The suite of specimens of sulphur (among which may be 
specified the splendid crystallizations from La Catolica in Sicily, and 
from Conilla in Spain, the stalactic, and other varieties, accompanied 
by selenite, sulphate of strontia, &c. ; and the massive and pulverulent 
sulphur found sublimed near the craters of volcanos, &c.) is succeeded 
by the Sulphurets , which occupy half of this and seven of the next fol¬ 
lowing Table Cases. They begin with sulphuret of manganese or man¬ 
ganese blende, also called mangan-glanz, from Nagyag in Transylvania 
and from Peru.—Among the numerous varieties of sulphuret of zinc, 
or zinc-blende, may be particularized those relative to colour, viz., the 
yellow, the brown, and the black-blende of Werner: the first of which 
is generally most pure, while the others contain a portion of iron; 
the radiated, fibrous and testaceous blende, the most characteristic 
specimens of which are from Przbram in Bohemia, and from Geroldseck 
in the Brisgau. 
Case 6_ Sulphurets of iron, or iron pyrites :—common pyrites, or 
marcasite, crystallized in cubes smooth and striated, variously modified, 
as octahedral and pentagono-dodecahedral forms, or these forms com¬ 
bined : from several localities, of which Traversella, in Piedmont, and the 
isle of Elba yield the finest specimens;— radiated pyrites, a substance 
very subject to decomposition, and to which belong most of the varieties 
of what is commonly called lenticular or coxcomb-pyrites, spear-pyrites, 
as also the globular pyrites of a radiated texture, and the hepatic or 
liver-pyrites of Werner, (distinct from the fer sulfure hepatique of 
some French mineralogists, which is both radiated and common iron 
pyrites converted into brown iron stone) ;— magnetic pyrites, which is 
nearly allied to the preceding species, from Bodenmais, Bavaria, &c. ; 
massive and crystallized in six-sided prisms. — Sulphuret of cobalt, from 
Bastnaes in Sweden.— Sulphuret of nickel or nickel-blende, formerly 
called capillary iron-pyrites (haarkies W.), and afterwards considered as 
native nickel, till its real composition was determined by Arfvedson, 
from Joachimsthal and Merthyr Tydvil— Sulphuret of cadmium, lately 
discovered at Bishoptown in Renfrewshire, and to which the name of 
greenockite has been given : one of the crystals here deposited well 
exhibits the peculiar adamantine lustre of this substance. 
Case 7. Sulphuret of copper, copper glance, or vitreous copper, 
variously crystallized, foliated, compact, Sec., chiefly from Cornwall; 
to which are also commonly referred the vegetable fossil remains 
(Cupressites Ullmanni, Room I. Wall Case 6) known by the name 
of Frankenberg corn-ears, from the bituminous marl-slate of Franken- 
berg in Hessia, which are principally composed of vitreous and grey 
copper: the sulphuret called copper indigo appears to be only a variety 
r glance. 
Sulphuret of copper and iron, to which belongs the copper pyrites 
or yellow copper, including the, pale-yellow fine-grained variety called 
hematitiform, or blistered copper-pyrites; and the variegated copper ore 
(buntkupfererz), differing from the former in the proportions of its con¬ 
stituent parts, and easily known by the reddish colour of its fractural 
surfaces : crystallized, massive and foliated.— Tennantite, by some re¬ 
ferred to fahl ore, or grey-copper ore, from Cornwall. 
D 
