| | Global Stone Filler Products (Chatsworth, GA) Ground calcium carbonate & magnesium products | |
| | Great Lakes Calcium Corp (Green Bay, WI) Ground calcium carbonate (high calcium limestone); crushed & broken limestone | |
| | Great Lakes Fluorspar Inc (Cleveland, OH) Manufacture & distribute calcium flouride(sales office) | |
| | Hoosier Calcium Corp (Bloomington, IN) High calcium limestone | |
| | Huber, J M Corp (Marble Hill, GA) Engineering services for calcium carbonate | |
| | Huron Lime Co (Huron, OH) High calcium & pebble quick lime | |
| | I M I Pipe Creek Jr (Swayzee, IN) Hi-calcium agricultiral lime, riprap & chemical grade stone | |
| | IMERYS (Marble Hill, GA) Crushed & ground marble & calcium carbonate | |
| | IMERYS Pigments & Additives (Roswell, GA) Industrial minerals: clay & calcium carbonates | |
| | J M Huber Corp (Quincy, IL) Manufactures limestone, chemicals, calcium carbonate & ferrous sulfate | |
| | Liquid Calcium Chloride Sales (Kawkawlin, MI) Distributor of chemicals: lithium calcium chloride | |
| | Marblehead Lime Co (River Rouge, MI) Lime, pebble & high calcium lime | |
| | Murlin Chemical Inc (W Conshohocken, PA) Calcium phosphates | |
| | National Lime & Stone Co (Bucyrus, OH) Stone, limestone products, plastic additives, stabilizers, calcium & compounds | |
| | New Eezy-Gro Inc (Sycamore, OH) Liquid calcium fertilizer | |
