May visitors spend much time searching for pebbles suitable for cutting
or for specimens. Mr. A. C. Keck describes the occurrence of very fine
red and green jasper pebbles with chalcedony and other gems at Redondo.
The chalcedony is cut and sold as moonstone, and the jasper as
bloodstone and sardonyx.
small quantity of opal was reported from Oregon, California, Colorado,
and North Carolina. That from Oregon was probably from the deposit in.
the eastern part of the State, a few miles below the town of Durkee,
described by Dr. Kunza as occurring in cavities in rhyolite
tuff. The opal from California came from the deposits in San Bernardino
County, about 20 miles northwest of Barstow. Small pieces of precious
opal and handsome specimen and ornamental material have been found
here. Some of the latter variety obtained by Mr. C. 0. Johnson is
described6 as dark red jasper streaked with semi-opal. Mr.
J. D. Endicott reports the discovery of lechosos or milky opal in the
water-worn gravels in the foot-hills south of Canon City, Colo. Opal in
North Carolina was limited to one specimen of lechosos or milky opal
found in the southern part of Iredell County by Mr. J. T. Cashion.
NEW SOUTH WALES.
The production of opal in New South Wales is still largely from the White Cliffs division.0
New grounds have been opened in the neighborhood of White Cliffs and
near Bunker, or Gemville. The ranges along the White Cliffs are still
unprospected, though it is thought they contain rich deposits of opal.
There was an increase in production from Wallangulla and Lightning
Ridge, in Walgett division. The production of opal from 1890 to 1906 is
given as £989,-099. The largest productions were £135,000 in 1899 and
£140,000 in 1902. The production for 1906 amounted to £56,000, of which
about £50,000 came from White Cliffs.
The opal mines of upper Hungary were advertised in 1907 for lease for a period of ten years d or
longer, or to be sold by the Government. At the same time about 30,000
carats of polished precious opal deposited with the exchequer was to
be put up for sale.
was produced in 1907 in the northeastern part of Arizona and the
northwestern part of New Mexico. The output came, as usual, chiefly
from the Indian reservations, where the stones were gathered by the
Indians and traded at different points. Mr. J. L. Hubbell reports a
quantity of peridot gathered from the surface on the Ziltsusayan Butte,
about 20 miles northeast of Ganado, Ariz.
"Mineral Resources U. S. for 1905, U. S. Geol. Survey, 1906, p. 1247.
6 San Diego News, January 23,1908.
« Ann. Kept. Dept. of Mines, New South Wales, 1906, p. 53.
d Mining World, May 18,1907.