136 DESCRIPTIONS OF MINERALS. — 
stein some gold. Specimens from Schwatz, and some other 
localities, contain 15 to 18 per cent. of mercury, and are 
called Spaniolite. A kind containing 9 to 13 per cent. of 
lead and 10 to 13 of silver, has been called Malinowskite. 
Obs. ‘The Cornish mines, Andreasberg in the Hartz, 
Kremnitz in Hungary, Freiberg in Saxony, Kapnik in Tran- 
sylvania, and Dillenberg in Nassau, afford fine erystalliza- 
tions of this ore. It is a common ore in the Chilian mines, 
and it is worked there and elsewhere for copper and often 
also for silver. Occurs also in Mexico; in Mariposa and 
Shasta counties, Cal.; abundantly at the Sheba and De Soto 
mines, Humboldt Co.; Nevada, near Austin in Lander Co. ; 
in the San Juan region, Colorado; at the Heintzelman 
Mine, and the Santa Rita Mine, in Arizona; also in fine 
crystallizations in the caves of Huallanca, on the Peruvian 
Andes, at a height of about 14,700 feet, an ore yielding 
much silver. ‘ 
Bournonite. Contains Sulphur 29°6, antimony 25:0, lead 42:24, cop- 
per 13°0=100. Its crystals are modified rectangular prisms, of a steel- 
gray color and streak, and are often compounded into shapes like a 
cog-wheel, whence it is called whezl-ore. H.=2°5-38. G.=5-766. 
From the Tyrol, Hartz, Transylvania, Saxony, Cornwall, and Siberia. 
Other sulpnantimonites or sulpharsenites of copper are Chalcostibite, 
Emplectite, Binnite, Stylotypite, Aikinite, Hnargite, Polybasite. Poly- 
basite contains also silver. 
Atacamite.—Copper Oxichloride. 
Trimetric; in rhombic prisms and other forms; also 
granular massive. Color green to blackish green. Lustre 
adamantine to vitreous. Streak apple-green. ‘Translucent 
to subtranslucent. H. —3-3°. G.=3°75-38°9.  Com- 
position, Cu Cl, +3 Cu O, H,=Chlorine 16°64, oxygen 11°25, 
copper 11°25, water 12°66=100. From the Atacama desert, 
between Chili and Peru, and elewhere in Chili; also from 
Bolivia, Vesuvius, Saxony, Spain, Cornwall. 
Cuprite.—Red Copper Ore. 
Isometric. In regular octahedrons, and modified forms of 
the same. Cleavage octahedral. Also massive, and some- 
times earthy. 
Color deep red, of various shades. Streak brownish red. 
Lustre adamantine or submetallic ; also earthy. Subtrans- 
parent to nearly opaque. Brittle. H. = 3°5-4 G. =o-80= 
Old. 
