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Gran Colombia is a Canadian-based mid-tier gold and silver exploration, development and production company with its primary focus in Colombia. Gran Colombia is currently the largest underground gold and silver producer in Colombia with several underground mines and two processing plants in operation at its Segovia and Marmato Operations.
voestalpine is a globally leading technology and capital goods group with a unique combination of material and processing expertise. voestalpine, which operates globally, has around 500 Group companies and locations in more than 50 countries on all five continents. It has been listed on the Vienna Stock Exchange since 1995.
Materials Testing Constultants is a Grand Rapids, MI-based company in the Agriculture and Mining sector.
American Geotechnical is a Yorba Linda, CA-based company in the Agriculture and Mining sector.
Cerrejon is a Miami, FL-based company in the Agriculture and Mining sector.