BUREAU OF ECONOMIC GEOLOGY
The University of Texas at Austin
Austin, Texas 78712
JOHN T. LONSDALE, Director
Report of Investigations—No. 42
Texas Gemstones
By
Elbert A. King, Jr.
February 1961
Second Printing—February 1963
Third Printing—September 1972
Fourth Printing—March 1983
Fifth Printing—August 1991