American Colloid Company – A Minerals Technology Company Listing Category Industrial Website https://www.mineralstech.com/ Phone (605) 892-7153 Physical Address 10881 US HWY 212 57717 Contact Provatia Potvin City Belle Fourche State South Dakota Details Description Since 1927 American Colloid has served as one of the largest employers in the area because of its mining to reclamation processing, transporting of Bentonite clay utilized in product and processes we use in everyday life. https://www.facebook.com/mineralstechnologies Contact listing ownerSend Message Name Email Phone Number Message