NATURAL HISTORY. 
49 
gallery. ] 
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 ;—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 mine¬ 
ralogists, which is both radiated and common iron-pyrites converted into 
brown iron stone) ;—magnetic pyrites, which is nearly allied to the pre¬ 
ceding species : massive and crystallized in six-sided prisms. — Sulphu- 
ret of cohalt, from Bastnaes in Sweden .—Sulphuret of nickel or nickel- 
blende, formerly called capillary iron-pyrites and hair-pyrites, and after¬ 
wards considered as native nickel, till its real composition was deter¬ 
mined by Arfvedson_ Sulphuret of cadmium, lately discovered at Bi- 
shopstowm in Renfrewshire, and to which the name of greenockite has 
been given. 
Case 7. Sulphuret of copper, copper glance, or vitreous copper , 
variously crystallized, foliated, compact, &c. ; to which are also com¬ 
monly 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 Frankenberg in Hessia, which are prin¬ 
cipally composed of vitreous and grey copper .—Sulphuret of copper 
and iron, to w T hich belongs the copper pyrites or yellow copper, in¬ 
cluding 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 constituent parts, and 
easily known by the reddish colour of its fractural surfaces : crystal¬ 
lized, massive and foliated.— Tennantite, by some referred to fahl ore, 
or grey-copper ore, from Cornwall. 
Case 8 contains a suite of specimens of sulphuret of lead or galena, 
which include a great variety of modifications of crystals, detached and 
grouped together, in combination with blende, pyrites, and many other 
substances ; galena of various grain, massive and disseminated ; galena 
of corroded appearance, decomposed and regenerated; the compact 
and specular variety, called slickenside by the Derbyshire miners, &c.— 
steinmannite, probably a distinct antimonial sulphur salt, is placed here, 
because several compact varieties of sulphuret of lead appear to be a 
mixture of it and common galena. 
Case 9. Sulphuret of bismuth, or bismuth-glance, in acicular crystals, 
from Riddarhyttan, &c .—Sulphuret of copper and bismuth, called 
copper-bismuth, from Wittichen, in the Black Forest.—The needle-ore 
of Werner, a triple sulphuret of bismuth, lead, and copper, only found 
near Ekatherineburg, in Siberia, accompanied by native gold, &c_ 
Sulphuret of copper and tin, or tin-pyrites, only found in Cornwall. — 
The remainder of this case is taken up by a considerable suite of 
specimens of sulphuret of mercury or cinnabar, (chiefly from Almaden, 
in Spain, and from the Palatinate,) divided by Werner into the dark-red 
D 
