- Advanced Quartz Fabrication
- Artisans Quarry Inc
- Artlines
- Behm Quartz Ind Inc
- Belo Horizonte Enterprises Inc
- Belo Horizonte Enterprises Inc
- Business Equipment & Supply Co
- Business Equipment & Supply Co
- Business Exchange Network Inc
- California Equipment Svc
- Coleman Crystal Ron's Mine
- CPS Specialty
- Crystal Distributing Co
- Custom Quartz Surfacing
- Esco Products Inc
- GE Newark Quartz Plant
- Great Lakes Glass Werks Inc
- Hayward Quartz Technology Inc
- Heraeus Quartz Inc
- Heraeus Quartztech
- Heraeus Quartztech
- Heraeus Shin-Etsu America Inc
- Heraeus Shin-Etsu America Inc
- Heraeus Tenevo Inc
- MGI Products
- Miller's Rock Shop
- QTZ
- Quality Quartz Engineering
- Quality Quartz Of America Inc
- Quality Quartz Products-Ohio
- Quarmex Corp
- Quartz Encounters
- Quartz Plus Inc
- Quartz Scientific Inc
- Saint-Gobain Quartz Intl
- Saint-Gobain ZIRPRO USA
- Sawyer Research Products Inc
- Scientific Glass
- Southwest Quartz LTD Co
- Sun Enterprise
- Thermo-Dynamics Inc
- Thermo-Dynamics Inc
- Universal Quartz
