district
of that colony. In a recent article by Mr. C. Anderson, mineralogist to
the Australian Museum, this paper is cited and some fresh specimens
received from Mr. Porter are described in detail."
The
principal localities are at Glen Innes and Inverell, places about 30
miles apart. Mr. Porter describes the zircons as found over a
considerable area of basaltic country on the northern watershed of the
Maclntire River. They occur in stream beds and in raised banks of clay
or gravel along the streams or strewn over the surface of low sloping
ridges. The specimens are generally broken and cleaved and much worn,
but some good crystals occur, varying from clear colorless to dark red.
TASMANIA.
R. Brauns givesb
the measurement of the crystals of zircon from Tasmania showing that
crystallograpically they very strongly resemble those from Russia.
Generally, however, the crystals are very large and rolled; others are
entirely rounded. These have been extensively imported at ldar and
Oberstein. Many of them are colorless and become violet-brown in color
by heating. Others are made entirely colorless by the same process.
GARNET. OREGON.
Mr.
L. Rush Livermoro. of Raker City, Oreg.. describes a deposit of garnets
in the Sutton Creek district, some miles south of Raker City, which he
regards as worthy of investigation.'' the says that near Pleasant
Valley, whore the principal rock appears to the a black argillite.
soft and crushed and with no well-marked planes of bedding, has been
found a strong ledge containing garnets resembling rhodolite. Some of
these; art; quite handsome and lustrous, and large enough to cut gems
up to 30 carats in weight. Further particulars of this occurrence are
quite desirable. Nothing has yet been done to develop it.
ESSONITE.
CALIFORNIA.
A
curious occurrence of garnet is reported by Mr. F. M. Siekler, as noted
by himself and Mr. George Frey at a point some 7 miles from Pala, San
Diego County, but not otherwise specified. The association here was of
the Ramona type—essonite garnet with beryl, the former varying from
light yellow to ruby-color. The garnets occur in rounded pieces like
pebbles or nodules. These were found to be, apparently, remnants or
cores of larger crystals that had decomposed, leaving their original
form as casts in the feldspar matrix. Resides the garnet cores these
cavities contained mica and red clay, doubtless products of alteration
from the garnet crystals that have partly disappeared.
A
fine display of garnets of various shades, chiefly from the Ramona
district, was made in the San Diego County exhibit of gem minerals at
the Lewis and Clark Exposition at Portland, Oreg.. in 1005.
a Rec. Austral. Museum, vol. 6, pt. 2. Sept.. 1905. pp. 95-96.
b Separat-Abdruck aus dem Centralbl. fur Mineralogie, 1905, pp. 483-485.
c Mining Record, July 29, 1905.
