Contact Us

For more information regarding our processes or to schedule analytical work, please email Dr. Paul O’Sullivan, Principal Manager, at p.osullivan@geoseps.com or call at +1-509-336-0562.

Additional contact:  Andrea O’Sullivan, Administrative Manager,  office@geoseps.com or +1-208-669-0727

Please send samples and sample registration form to

GeoSep Services
1521 Pine Cone Road
Moscow, Idaho 83843 USA


Production Facility:
GeoSep Services
509 W. Palouse River Dr. Unit #102
Moscow, Idaho 83843 USA
+1-208-883-3227

For questions regarding open mineral separation projects, please contact Jim McMillan, Facility Manager, at lab@geoseps.com.