Campbell J. Jones

Consolidated Rutile Ltd. is a privately held metal mining firm. The company was founded in 1963 and is headquartered in Brisbane, Australia.

Unimin Corp. provides industrial mineral mining and production services. It offers silica, quartz, feldspar, nepheline syenite, calcium carbonate, clay, kaolin, lime and limestone products. The company was founded in 1970 and is headquartered in New Canaan, CT.

Unimin Australia Ltd. processes and supplies raw materials. Its products include silica sand and feldspar, limestone, dolomite, magnetite, talc, bentonite, barites, and clays. The firm provides services to the manufacturing industries. It has operations in the New Zealand and Asian regions. The company was founded in 1970 and is headquartered in Sydney, Australia.

GreenTech Minerals Ltd. engages in mining, preliminary processing, and exporting of high purity quartz feedstock. It offers products for e solar photovoltaic (PV), computer chip, and other high-technology industries. The company was founded in 2005 and is headquartered in Sydney, Australia.

Part of SCR-Sibelco NV, Sibelco Australia Ltd. is an Australian company that produces silica sand and derived products. The private company is based in North Sydney, Australia.

Covia Holdings LLC. engages in the provision of diversified mineral-based and material solutions. It offers custom toll blending, micronization, bagging and packaging, and logistics. The company was founded in 1970 and is headquartered in Independence, OH.