gallery.] natural history. (Minerals.) Cl 
Case 7. Sulphuret of copper , copper glance , or vitreous copper, 
variously crystallized, foliated, compact, &c., 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 
of copper 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. 
Case 8 contains a suite of specimens of sulphuret of lead or galena , 
which include a great variety of modifications of crystals, detached and 
o-rouped together, (the more remarkable modifications, besides those of 
Great Britain, from the Hartz and from Saxony,) 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 anti- 
monial 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 ( bismuthine of 
Beudant), 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 bis- 
muth, 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; it is called bell metal oie on ac- 
count. of its colour, which is irequently that of bronze. The remaindei 
of this case is taken up by a considerable suite of specimens of sul- 
phuret of mercury or cinnabar, (chiefly from Almaden, in Spain, and 
from the Palatinate,) divided by Werner into the dark-red (by far the 
most common variety), and the' bright-red cinnabar (native vermilion, 
much esteemed by painters); the idrialine-cinnabar, or brand-erz, a 
mixture of cinnabar with the bituminous substance called idrialine, and 
earthy particles, from Idria, in Carniola, compact and slaty *.. the same 
with globular bodies composed of concentric testaceous laminae, being 
the korallenerz (coral ore) of Werner. 
Case 10. Sulphuret of silver, common silver glance , or henkelite, 
massive, crystallized, and in other external forms, among which are the 
laminar and capillary : the black silver, which is often seen coating 
other ores of silver, appears to be a pulverulent variety of this species ; 
flexible silver glance, or sternbergite the scarce donacargyrite, or 
schilfertz of German mineralogists, w'hich, however, is considered as a 
combination of several sulph-antimoniurets of silver and lead. — Sul- 
phuret of antimony ( antimonile , Haid.),also called grey antimony, com- 
pact, foliated, radiated, and plumose : the more remarkable among 
these are the specimens of crystallized antimony in splendid groups, 
