Scio Diamond is a company that creates single-crystal, Type IIa diamonds for the jewelry market and industrial applications.
Comstock Mining is a gold and silver mining company.
Breedon Group is a company which focuses on the quarrying, production, and sale of aggregates.
Applied Minerals extracts, processes, and markets halloysite clay and iron oxide.
Odyssey Marine Exploration is a company engaging in deep-ocean exploration activities worldwide.
Compass Minerals is a supplier of highway deicing products, helping to keep roadways safe.
Ryerson Holding Corporation is a metals distributor and processor.
Intrepid Potash is the only producer of potash in the United States. We also produce the specialty fertilizer, Trio.
Alliance Resource Partners produces and markets coal to utilities and industrial users.
U.S. Gold is a gold exploration and development company.
Kennametal is a company developing and applying tungsten carbides, ceramics, and super-hard materials and solutions for use in metal cutting and extreme wear applications to enable customers work against corrosion and high temperatures conditions.
Layne Christensen Company is a water management, construction and drilling company.