Mineral Processing Companies
| International Mill Svc (Gary, IN)
Primarily Serving: Hammond, IN - Oak Lawn, IL - Tinley Park, IL - Chicago, IL |
| Isp Minerals (Blue Ridge Summi, PA) |
| Isp Minerals Inc (Annapolis, MO)
Primarily Serving: Saint Louis, MO - Saint Charles, MO - Saint Peters, MO - O Fallon, MO |
| Kamph Rock Crushing Co (Dayton, OR)
Primarily Serving: Salem, OR - Hillsboro, OR - Beaverton, OR - Portland, OR |
| Lafarge Corp (Girard, OH)
Primarily Serving: Youngstown, OH - Cuyahoga Falls, OH - Canton, OH - Akron, OH |
| M Brashem Inc (Bellevue, WA)
Primarily Serving: Redmond, WA - Seattle, WA - Renton, WA - Issaquah, WA |
| Milwhite Inc (Van Horn, TX)
Primarily Serving: El Paso, TX - Odessa, TX - Midland, TX - Las Cruces, NM |
| Multi Serv (Warren, OH)
Primarily Serving: Youngstown, OH - Cuyahoga Falls, OH - Akron, OH - Mentor, OH |
| Multi Serv (Mansfield, OH)
Primarily Serving: Elyria, OH - Lorain, OH - Akron, OH - Columbus, OH |
| Nevada Star Resource Corp (Bellevue, WA)
Primarily Serving: Redmond, WA - Seattle, WA - Renton, WA - Issaquah, WA |
| Olympic Mill Svc (Lemont, IL)
Primarily Serving: Bolingbrook, IL - Orland Park, IL - Naperville, IL - Oak Lawn, IL |
| Operation Hope (Jackson, TN)
Primarily Serving: Memphis, TN - Clarksville, TN - Jonesboro, AR - Franklin, TN |
| Oxbow (Aurora, IN)
Primarily Serving: Cincinnati, OH - Hamilton, OH - Middletown, OH - Dayton, OH |
| Penna Perlite Corp of York (York, PA)
Primarily Serving: Lancaster, PA - Towson, MD - Baltimore, MD - Ellicott City, MD |
| Pennsylvania Perlite Corp (Bethlehem, PA)
Primarily Serving: Allentown, PA - Reading, PA - Levittown, PA - Trenton, NJ |
| Polymer Drilling Systems (El Dorado, AR)
Primarily Serving: Monroe, LA - Bossier City, LA - Pine Bluff, AR - Shreveport, LA |
| Ray Brown Enterprises (Woodruff, SC)
Primarily Serving: Greenville, SC - Rock Hill, SC - Gastonia, NC - Asheville, NC |
| Southern Clay Products Inc (Gonzales, TX)
Primarily Serving: San Marcos, TX - New Braunfels, TX - Victoria, TX - Austin, TX |
| Sprunger's Minerals (Delta, UT)
Primarily Serving: Provo, UT - Orem, UT - South Jordan, UT - West Jordan, UT |
| Superior Sand Co (Friendsville, MD)
Primarily Serving: Pittsburgh, PA - Charles Town, WV - Frederick, MD - Centreville, VA |
| Therm-O-Rock East Inc (New Eagle, PA)
Primarily Serving: Pittsburgh, PA - Youngstown, OH - Canton, OH - Akron, OH |
| Unimin Corp (Mauk, GA)
Primarily Serving: Columbus, GA - Cobb, GA - Warner Robins, GA - Macon, GA |
| United States Pumice Co (Lee Vining, CA)
Primarily Serving: Carson City, NV - Clovis, CA - Madera, CA - Merced, CA |
| Virginia Vermiculite Ltd (Louisa, VA)
Primarily Serving: Richmond, VA - Centreville, VA - Burke, VA - Lynchburg, VA |
