Barbour County index. [volume] (Medicine Lodge, Kan.) 1880-current, 1883-03-09
GarnIets..

The color Of the garnet is blood or
cherry red; when mined with blue i
passes into crimson and violet red, and
when tinged with yellow into hyacinth
red; it IS also met with of reddish
brown color, @liver-brown and black.
also greenish black. 1t occurs in mass,
disseminated, in angular fragments, or
crystallized. It's primitive figure is the
rhomboidal dodecahedron, which, when
somewhat heightened, presents the APP
pearance of a short six-sided prism, the
faces of which are parallelograms termi-
mated by trihedral SUBMITS with rhum-
boidal faces. Sometimes the original
faces of the dodecahedrOn entirely dis
appear, and the result is solid bounded
by twenty -four equal and similar trapezi-
ums. Sometimes. al the sides of the
primitive dodecahedron are replaced by
lengthened hexagons, whence results 3
solid bounded by twelve rombs and
twenty four hexagons. Other more com.
plicated figures, but which cannot be
rendered Ineligible by mere description.
originate from the mixture of the two
preceding notifications. The size OF
the crystalsissubject to greatvariations.
Some are no larger than pins head.
while others are four inches or more in
diameter. The external luster is CASUAL
but generally glistening; the Internal
luster is bright-shining, vitreous. Ito
fracture is perfectly conchoidal, passin
into impsrfectH .conchoidal. coarse
grained, uneven or splintery. Its frag-
ments are unfortunately angular and
sharp-edged. IL sometimes occurs in
granular or lamellar distinct eencretions.
1t varies from transparent to translucent
on the edges. Its hardness. is superior
to that of quartz. Its specific gravity is
from 81 to AZ.
1t is often magnetic. and is fusibls
without much difficulty before the blow,
pipe into black enamel. When strongly
a gray dusky glass full of grains of iron,
cent - 49, 4-T~ - & VI ---1'A
The mineral has. been repeatedly an
alyzed by Klaproth, Vauquelin, and
other able chemists, but without much
agreement in the results; and as in gen.
eral the same method of analysis has
been adopted, the remarkable differences
which have occurred can only be at
tributed to real variation in its COM
position; they all agree, however, that
it contains large proportion of iron.
and possibly this ingredient may be the
one which principally Influences its crys-
utilization. sas
The Bohemian garnet has been an
alyzed by-Klaproth, with the following
results: Oxide of iron, 1865; oxide OF
manganese OBS; slick, 40; alumina,
2'S5; lime, 3.5; and magnesia, 10.
Vauuuelin's analysis of the same stone
gives the following: Oxide of iron, Al;
slick, Sc; alumina, 30; and lime, 3. The
Sirialr garnet, according 70 klaproth,
contains: Oxide of iroh, 36;soxide OF
manganese, OBS; slick, s35z5; and
alumina, 1926. The most beautiful and
valuable garnets are the oriental They
come principally from Pegu; and the
town of Sirian having been formerly
the chief mart for them, they are hence
by corruption known among lapidaries
by the appellation of Syrian garnets.
They appear to be the earbbncle of the
ancients; their color is crimson, vergino
into very red violet; they are trans
parent, and have a conchoidal fracture
OF their geological situation we are en-
tirely ignorant e. ~---.,-----.
Next in estimation tothe oriental is the
bohemian garnet. 1t is met with in the
Mittelgebirge of Bohemia and in Saxony;
its color is blood red, verging into yellow;
\ it never occurs Ccrystallized, but only in
rounded and angular grains; it is trans
parent, and its fracture is conchoidal.
It occurs in foetz-trap and in alluvia;
land, formed by the decomposition Of
this class of mountains; it is also met
with in serpentine. fAS
Common garnet occurs almost always
in primitive rock, especially in micaceous
schistus, chloritic slate. and serpentine;
it is sometimes so abundant as to consti-
tute the principal part of the rocky mass
in which it is found, which is then an
excellent tiux for iron ores on account of
its fusibility and the large quantity of
this metal which it contains.
The oriental and Bohemian garnets
when cut and polished are very beauti.
full. and were formerly particularly the
first in high estimation, but by the
caprice of fashion their employment,
and consequently their value, have since
much declined. = Glassware Reporter.