72
GARNET.—Garnets are abundant both in the Central Mineral District and in Trans-Pecos Texas.
Fine cabinet specimens showing both large and attractive crystals are in the Museum, but no systematic work has been done in working the deposits. There are several colors—brown, black, and green—and they occur in abundance. Among the localities may be mentioned Clear Creek valley on Burnet and Bluffton road, Babyhead, King Mountains, and similar areas in Llano and Gillespie counties; in the Quitman Mountains, and other localities in Trans-Pecos Texas. In Llano County fine crystals are also found of Idocrase, or Vesuvianite, which is near the garnet in character.
TOURMALINE.—Black tourmaline is abundant in certain granites of Llano County, and will be useful for all purposes for which it can be employed, although there is no prospect of specimens of value for cabinet purposes being found.
CHALCEDONY.—Some fine specimens of chalcedony have been found in Travis County in the neighborhood of the disturbances caused by the Pilot Knob eruption. They also occur in Presidio County and other portions of West Texas.
CARNELIAN.—Carnelians have been found in the vicinity of Van Horn, El Paso County.
SARDONYX.—Beautiful specimens of sardonyx are found in the Trans-Pecos region in El Paso or Jeff Davis counties. A number of specimens are now in the Museum.
JASPER.—In this same region are found handsome varieties of plain and banded jasper, but, like the other deposits, there has been no attempt at development, and only a few specimens have been collected by persons happening on them. Pebbles of jasper are also abundant in the drift as far north as the Staked Plains.
AGATE.—The occurrence of this beautiful stone has been mentioned in the former reports of this Survey. It is found abundantly in several parts of West Texas and occasionally in the river drift of the Colorado. In West Texas they are found in a schistose material and scattered over the surface in large quantities, from fragments to boulders of considerable size. The colors are rich, and the banded and fortification agates show beautiful bandings and stripes. Moss agates are also plentiful, and there is ample room for the establishment of an industry in this material, even if they are only collected for shipment abroad. The average price paid for rough agate for manufacturing purposes at Idar,