The Arizona sentinel., 1879-03-29
Galena Ores.

| treasure in our wonderfully rich noun
tain districts, it is important to know
their peculiarities; yet, in hurriedly
written article, we may be able to note
only few of the leading ones:
| Argenite.-This is, beyond doubt, sui
phur compound Luster metallic, streak
and color blacklsh lead-gray, streak
shining. Opaque; fracture small, sub-con-
choidal, uneven, perfectly sectile. This
ore is quite abunoant in our great COM
stock mine, in Nevada, and in that region
is found with stephanite, native gold and
other metals at Ruse river. Specimens
have been found in Tennessee and North
ern Michigan, and at Cornish, New Hamp-
shire, in both latter cases associated with
copper. II is quite frequently met with
! in the old world, at Freibeyg, at krem-
nitz III Hungary, Konigsberg in Norway,
in Bolivia, Peru, Chill and Mexico. IT is
most valuable silver ore, and is to enter
into the product Of the precious metals OF
this continent still more largely in the
future.
Ncumannite-Its appearance is, luster
metallic, spleudent, color and streak iron
black In This country almost unknown :
it occurs at Tilkerooie in the Hare-
r.amed after the crystullograDher Maui
mann: 1t is called uy some selenide of sill
yer.
Eucairste Soft, easily eut with a knife,
luster metallic, eClor between silvcr-whita
and lead graz, sIreaK shining. It's found
in Sweden in association with cUpPer, as
at the Slsrkerun copper mine in Chill.
This gives a copious fume of Selenium,
and on charcoal fuses to gray metallic
globule, leaving bead of seleuide of sill
yer. 1t is found sometimes Undecided in
calcite.
Croobesite.-Is found in Norway, bat not
yet in this country. Fuses easily, green
ish black shining enamel, coloring the
flames strongly green, soluble in nitric
acid, but not in muriatic acid formerly
regarded as selenide of copper; is not as
rich In silver, usually SO copper, to lin
silver. Not much known in North Amer
fra as yet.
Galenite Il Ntharge-lihe product from
the ore In the open tube gives sulphH-
rous fumes, fuses on charcoal5 coats the
coal yellow, and leaves globue Of me.
tallfg lead This, the must common OF
the grotfp, is fUuntt in many places, often
with so little silver rs not t0 be profitable
TO mine except for lead. It occurs III
beds and veins, often in stratiaea finfe-
stone, usually OF the lower silurians asso.
ciatcd with ble1sde; snnfthsonise, {" dry
bone " Of She miner,) calcite, etc. In Hi
nois this is found associated with Eourfte
In Arizona is is associated with the rich
est silver mines, which is true OF Colorado
and Nevada. It ALI comes under the head
of galena, as named by our sffners.
ClanstI,eIte-Luster metallic, color lead
gray, somewhat bldlsh, streak darker
opaque, fractttre eranulatea and shining
sometimes contains cobalt, copper, silver
and iron; resembles galenite except the
singe of blue, by which the careful eye
can distinguish it from the former.
Zorgite.-Luster metallic, color dark o,
sight lead gray, sometimes reddish, OTTER
; a brass-yellow or blue tarnish, brittle has
the appearance Of rich silver ore, bu
often has only a trace OF silver, thus DE
ceiylng tie inexperienced prospectoT. !
is fuunG soInetthes associated with scMst
galenite and malachite, gnG is deceptive
LeItr6uekate.-Color lead gray, steel gray
iron black, brittle: in the closed tube give
a lustrons metallic-gray sublimate of mer
curry; has the appearance of good sil7e
orc, huG Is OSlilStO1l t1u Il oIdtC.
44Itaate.-Rarely i'm cubes, luster metal
i lie, color tim white. res embling uatipe an
= timony, with yellowfsh stain. Its com
!, position is teilTium 3S.7, from analyst
: by Prof. G. Rose. ONLY trace OF silve
r Usually; well calculated to- deceive.
: Bomae-Luster metallic, color bet%ec
c copner-red and pinchbech-brown pal
grayish black streaks, slightly shinins
BRITTLE; is a copper ore really, and onl
s valuable as SUCH; often taken for rich ST
f yer ore, bus has seldom more than trac
e Of silver.
Y Bs,ze6easite Of copper, luste
|. metallic, color siver-white, siiinin
t streaks, vet no silver in it.
J. CastilZite.-Luster metallic; color an
t tarnish as in bomte, shows by appf1eatio
v of nitric acid sulphate of lead, bat reall
n contains no silver worth trying To- say,
:. yet has quite fattering appearance.
e Eleven of this group of seventeen ar
L given with the hope it may aid some {
# our hardy pioneers II the rich argentlfel