666 MINERAL RESOURCES, 1913—PART II.
one
by R. L. Royse. Mr. Royse describes the one he found as a small green
diamond with fine luster, weighing 0.20 metric carat. One of the stones
found by Hugh Marshall is described as colorless or white and weighing
0.73 metric carat. Mr. Bradford kindly sent one of the stones found by
Fred Doyle to the Survey for examination. It is a yellowish stone, only
partly transparent, and weighed 0.69 metric carat. The crystal form is
that of a distorted trisoctahedron truncated by the octahedron. A point
projecting from one side of the stone indicates that it is probably a
twinned crystal.
NEW YORK.
Specimens
from two peridotite outcrops in Syracuse, N. Y., were received from Mr.
Edwin C. Dinturff, of that city. Some of these were from Green Street
and James Street, on the "south crater," and the others from Griffith
Street and Highland Street, on the "north crater."
Mr. Dinturff states that at the "south crater" ex-posure peridotite has
been found over an area of about 800 feet by 1,200 feet and that at the
"north crater" peridotite has been found for about 300 feet in sewer
excavations with another exposure, possibly part of the same mass,
about 400 yards farther north. The two localities are about
three-fourths of a mile apart. In a small hill on Green Street in the
"south crater" the peridotite is seen in contact with shale. This is in
the peridotite area which has been known for a number of years.
The
peridotites of Syracuse bear a marked resemblance to those of South
Africa, Arkansas, and Kentucky in composition, texture, inclusions, and
weathering. The material from Highland Street was hard when first
excavated, but much of it has disintegrated on exposure to the
atmosphere. No careful search for diamonds has been made in the
peridotite of Syracuse, though the nature of the material would seem to
justify such attempts as much as the peridotite of Kentucky, on which
considerable work has been expended. Con-centrates from panning the
altered rock contained garnet, zircon, ohvine, diopside, and
other minerals. The zircon occurs in minute crystals, which are best
separated by treating the peridotite with hydrofluoric acid. In this
separation fine particles of ilmenite or rutile are also obtained.
VIRGINIA.
Information
on the reported finding of a diamond in Tazewel County, Va., was kindly
supplied by Messrs. Charles H. Reynolds, of North Tazewell; H. W.
Pobst, a jeweler, of Tazewell; and J. Sanders Gillespie, of Cliffield.
This diamond is reported to have been found by Frank Brewster on the
farm of Mr. Gillespie, near Pounding Mill, while plowing in a
cornfield. The stone was sold to Mr. Pobst, who had it cut by J. R.
Wood & Sons, of New York The cut stone weighs 0.83 metric carat and
is considered to be of very fine color and quality by Mr. Pobst. Little
has been done toward prospecting for other diamonds.
