Tosoh Quartz, Inc. Portland
14380 NW Science Park Drive Portland, OR 97229
(All visitors must check in at 14250 NW Science Park Drive)
Voice: 503-605-5600 Fax: 503-605-5688
Tosoh Quartz, Inc. Durham
Unit 2 Greencroft Industrial Park Stanley Co. Durham UK DH9 7YB
Voice: +44-1207-524400 Fax: +44-1207-524409