east
of Ducktown, Tennessee, first described by Prof. E. S. Dana(a), has
furnished some of the finest "known twinnings of this material. From
their beauty these have found a sale abroad as ornaments and charms,
and are more highly regarded than those found at Bretagne, France,
which the superstitious believe were dropped from Heaven, according to
the legend. They occur twinned in single and double crosses, aud large
quantities were found in decomposed rock, of which perhaps one-tenth
were perfect crystals. They usually require a certain amount of
scraping and cleaning when found.
Some
fine brilliant crystals are found at Windham, Maine, some of the twins
forming fine crosses. Occasionally crystals are iouud here that would
afford small miueralogical gems, if cut. Their use for natural
ornaments is exceedingly limited abroad, and here they are used
scarcely at all.
Staurolite
is i'ound also at Franconia and Lisbon, New Hampshire, in mica slate;
on the shores of Mill pond, loose in the soil; at Grantham ; at Cabot,
in Vermont; at Chesterfield, Massachusetts; at Bolton, Litch field,
Stafford, Tolland, and Vernon,Connecticut; on the Wissahickon, 8 miles
from Philadelphia, in abundant reddish brown crystals; and at Canton,
Georgia, at the lead miue.
It
is also found at the Parker mine, Cherokee county, North Carolina, in
fine twins; also on Persimmon, Hanging Dog, and Bear creeks, Madison
county, and Tusquitee creek, Clay county. At the latter localities it
is found in argillaceous and talcose slates.
Some
staurolite macles similar to a chiastolite are described by Dr. C. T.
Jackaon from Chailestown, New Hampshire, which by insensible shades
pass into andalusite macles.
lolite.—The
late Dr. Torrey possessed a fine seal made of a cube of iolite from the
albite granite of Haddam, Connecticut, that displayed its dichroitic
properties to the greatest perfection, the blue being remarkably fine.
Though this locality promised well, the supply of gem material was
scant. It has been found near the Norwich and Worcester railroad,
between the Shetucket and Quinnebaug, where the gneiss has been
quarried for the road. At Brimfield, Massachusetts, on the road leading
to Warren, it occurs with andalusite in gneiss, and also near Norwich,
Connecticut. It is found also at Richmond, New Hampshire, with
anthophyllite in a talcose rock. No gems are being found at present.
Tourmaline.—One of the remarkable tourmaline localities (b) of
the world is Mount Apatite, on the Hatch farm, Auburn, Androscoggin
county, Maine, the locality first discovered by Mr. S. B. Carter. It
was worked by Mr. N. H. Perry, who first found the true vein in 1882,
and obtained probably one thousand five hundred crystals. They are
a American Journal of Science, Vol. XL, May, 1876, page 385.
b American Journal of Science, Vol. XXVJI., April, 1884. " Proceedings American Association for the Advancement of Science," 1883.
