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GARNET.<br />

The garnet has been known from earliest times, and has always<br />

been exceedingly popular. Once it commanded a high price, and<br />

was frequently, as well as spinel, confounded with ruby. "Stones<br />

of the same color," explains King, "were promiscuously classed<br />

under one head by the ignorance of the Middle Ages (unacquainted<br />

with even the ancient test of hardness) whence has arisen that<br />

strange interchange of names between ancient and modern precious<br />

stones so perplexing to every mineralogist."<br />

"Garnet," according to the best authorities, is derived from<br />

pomegranate, because of the resemblance of its color to the jelly-like<br />

juice surrounding the seeds of that fruit. This is quite as applicable<br />

to the ruby, which was also included with the "Granatica," and the<br />

spinel. At an earlier date, they were all grouped under the general<br />

head of carbunculus, from carbo, a coal, because of their supposed resemblance<br />

to burning coal. The modern carbuncle, which is never a<br />

specific gem, but always a garnet cut convex, exemplifies this idea to<br />

a marked degree, particularly when placed in the direct rays of the<br />

sun. Usually, such a stone is cut en cabochon, hollowed out<br />

though as garnet is brittle, it is safer to have the flat bottom and<br />

set against a background of convex gold. This was a favorite treatment<br />

for centuries, and is considered artistic at the present time.<br />

Wily Asiatics often place colored foil at the back to improve a tint,<br />

and deceive the purchaser. It is not safe to buy in the Orient any<br />

jewel set with closed back unless the dealer is known as reliable.<br />

"En cabochon" is the French expression for the convex, polished<br />

but uncut. While carbuncle usually means garnet mounted in<br />

this manner, the term is applied to any stone so cut; which is best<br />

for all dark or badly flawed specimens, throwing light into their<br />

depths, making them sometimes more brilliant by night than day.<br />

The garnet family is divided into six or more sub-species, which<br />

pass into each other by almost imperceptible gradations. They are<br />

all silicates of different protoxides or peroxide, combined with alum-<br />

ina, the variations causing the difference in hardness and color, as :<br />

the alumina-lime garnet, of which the essonite is an example ; alumina-magnesia<br />

garnet, otherwise the Bohemian pyrope; alumina-iron<br />

garnet, as the almandine ; alumina-manganese garnet, the spessartite,<br />

from Amelia Court House, Virginia ; iron-lime garnet, the black and<br />

a variety of the common kind; lime-chrome garnet, the emeraldgreen<br />

ouvarovite of Siberia.<br />

Garnets are easily melted by the blowpipe and some varieties,<br />

as the black garnet or melanite, found in the lavas of Vesuvius, seem<br />

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