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PRECIOUS STONES. 235
in gneiss. The variety Aquamarine-Chrysolite is found in Brazil.
In
North America, Emerald is found at Stony Point in Alexander County,
North Carolina, with Hiddenite; other forms of Beryl also occur here.
Russel Gap Road, also in Alexander County, is a good locality for
Aquamarine. In Maine, in Oxford County, green Beryl is found, and at
Albany Golden Beryl occurs. At Royalston in Massachusetts, Beryl of a
sapphire blue is found. At Grafton in Hampshire, a large Beryl crystal
was found which weighed 2-1/2 tons. Emerald also occurs at Haddam in
Connecticut. In Colorado, on Mount Antero very fine Aquamarines are
found, associated with Phenakite.
In
the Ural Mountains Beryl is found at many places ; thus in the
Ekaterinburg district it is found at Mursinka and Shaitanka in cavities
in pegmatitic rock. The variety Aquamarine-Chrysolite occurs here as
well as Beryl of other shades, as various greens and yellows. The
crystals are smooth and are associated with Topaz, Felspar, Tourmaline
and Quartz. To the east of Ekaterinburg Emerald occurs in mica-schist
with Cbrysoberyl, Butile, Phenakite, Apatite, and Fluor Spar. The
crystals, which are often large, are in many cases poor, show
dislocations, and are rarely terminated.
In
the Ilmen Mountains pale green Beryl is found in pegmatite with Topaz
and Amazon stone, and large crystals occur in the Altai Mountains. In
the Nerchinsk district Beryl is found in the Adun-Chalon Mountains in
pegmatite bands in granite with Topaz and Quartz, with over all a layer
of Limonite (Fig. 22). Also on the Urulga Biver in tine yellow-green
crystals,
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