Group of employees at one of the best companies to work for.

Who we are

We're TQC, a team of rock stars scattered across 3 continents and united by our mission to change the world with the power of quartz

TQC is a leading mining and mineral processing company that safeguards the entire value chain from extraction to refinement, packaging and testing

Our challenge is to identify unique rock deposits and transform them into the purest form of silica on the planet using a series of proprietary separation techniques.

Black and white archival photo of mining buildings in Spruce Pine

A legacy of engineering rocks

We’ve accomplished a lot in the past 100 years. From a small family business to our current position as a global leader in high purity quartz, we remain true to our core values of quality, integrity, and innovation. Today, we're proud to continue this legacy by delivering the highest-quality products to customers around the world.

Man wearing safety gear while he works in high-tech mining factory packing

Our commitment to your safety

At TQC, safety is not just a priority – it is in our DNA. Our people are the most important part of the company. We follow the strictest standards that not only meet but often exceed local regulations. We're proud to be an industry leader in workplace safety.

Two men who are plant workers in bright yellow safety gear hugging each other and smiling

People-driven values

The only areas where we strive for uniformity are product quality and our commitment to the core values: teamwork, innovation, ambition, accountability, fun, and caring for people and the planet. We each bring something valuable to the table. Who we are shapes TQC on a daily basis and leads the way for sustained growth.

Leadership Team

Thomas Guillaume


Jeffrey Curtis


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Ingrid Dahn

Global HR Director

Man in blue button-down shirt smiling at camera

Cato Lund

Director of Norway Operations

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Michael Yarborough

General Manager, United States

Man in white checked shirt smiling at camera

Benny Hallam

Vice President of Sales, R&D, Marketing

Robert Kvamme

Technical Director

Kari Moen

Global Quality Director

All of us have one goal: to make the best quality quartz we can and that everyone is on the same page. If you have a team that’s on the same page and moving forward, that’s a good place to be.
- Perry Bundy, Operations Supervisor