An Overview of Production of Specific U.S. Gemstones

GEMSTONES California Tourmaline (Photo courtesy of Smithsonian Institution)

Contents

U.S. Department of the Interior U.S. Geological Survey Minerals Information 988 National Center Reston, VA 20192 USA URL:  http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/index.html Maintained by:  rcallaghan@usgs.gov Last modification:  17-Jul-2002@11:05 Privacy Statement || Disclaimer || FOIA || Accessibility