| Business | Phone |
| Tosoh Quartz Inc 14380 Nw Science Park Dr, Portland 97229 | (503) 605-5600 |
| Artist Blown Glass By Pb Neff 316 Nw Glisan St, Portland 97209 | (503) 223-1875 |
| Elements Glass 1315 Nw Overton St, Portland 97209 | (503) 228-0575 |
| Master GlassWorks 10930 NW Old Cornelius Pass Rd, Portland 97231 | (503) 318-5756 |