GRL HAS MOVED

After more than 27 years in the same location, in August, 2021, Geochemical Research Laboratory moved from Portola Valley to a larger facility in Sacramento, California!

Please contact Dr. Richard Hughes and send specimens for analysis to the new laboratory address:

2440 East Tiffany Lane, Sacramento, CA  95827-1433

Dr. Hughes can be contacted by phone at: (650) 400 -6815

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Geochemical Research Laboratory (GRL), founded by Dr. Richard Hughes in 1986, specializes in archaeological geochemistry (obsidian sourcing); specifically, the use of energy dispersive x-ray fluorescence (edxrf) spectrometry to determine the selected major, minor, trace, and rare earth element composition of volcanic rocks (predominantly obsidian, dacite, andesite, and basalt), and the use of distinctive combinations of various chemical elements to determine the likely geologic source of origin for archaeological artifacts.