lxxii REPORT OF THE STATE GEOLOGIST. 



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 Yesuvianite, 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 cab- 

 inet 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 Yan 

 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 at- 

 tempt 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 consider- 

 able 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, 



