Acicular crystals, resembling rutile in appearance, ` sometimes penetrate crystals of pale-coloured amethyst, for instance, at Wolf's Island in Lake Onega in Russia: this form of the mineral has long been known as onegite, and the crystals enclosing it are cut for ornamental purposes under the name of "Cupid's darts" (fleches d'amour).
To Lake Onega, and S.E.
Above the sea, still filled by Lakes Peipus, Ladoga, Onega, Byelo-ozero, Lacha, Vozhe, and many thousands of smaller lakes, skirts the central plateau on the N., and follows the same E.N.E.
Only a few low swellings penetrate into it from the N.W., about Lake Onega, and reach 900 ft., while in the N.E.
The Onega, which flows into Onega Bay, has rapids; but timber is floated down in spring, and fishing and some navigation are carried on in the lower portion.
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