LG Everist

Our company was founded 140 years ago. It was built through succeeding generations by people who saw opportunities to grow - and took them. Click on the gold coin to discover our company's unique and compelling history.


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Please click on the "OUR STORY" button. See what makes us unique and why we've been around for more than 140 years. Thank You.


Industrial Stone

The only remaining Sioux Quartzite dimensional stone operation is located in America’s heartland. Here the highly specialized skill of the stone cutter is matched with sophisticated machinery to produce a variety of stone products. We produce large and small stones with tight tolerances using premium quartzite for a variety of industrial processing applications from grinding to oil drilling equipment. All industrial stones are custom designed by our engineering department to meet your most exacting specifications and design requirements. With quartzite being one of the world’s hardest stones, it has become an invaluable element in many applications. Chemically, the product is 98% silicon dioxide. That purity, along with its inherent toughness, hardness, and close-grained structure make it the ideal natural stone for industrial processing. It’s the perfect stone where contamination of materials being ground by wear cannot be tolerated.

Industrial Stone

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  • lining blocks

  • Grinding mills and media
  • Geological engineering
  • Drill equipment/optimization
  • Stone cutting tools
  • Stone wear plates
  • Impact testing
  • Smelting processes
  • Many more...


  • Silicon Dioxide 98.1%
  • Aluminum Oxide 1.18%
  • Iron Oxide 0.19%
  • Magnesium Oxide 0.01%
  • Calcium Oxide 0.02%
  • Sodium Oxide 0.15%
  • Potassium Oxide 0.25%
  • Titanium Oxide 0.15%


  • % Absorption 0.12 avg.
  • Bulk Specific Gravity 2.646 avg.
  • lb/ft3 Density 165 avg.
  • lb/in2 Comprehensive strength 29,720 avg.
  • lb/in2 Modulus of Rupture 4,660 avg.
  • lb/in2 Flexural Strength 4,310 avg.

Corporate Office
350 S. Main Ave., Suite 400
Sioux Falls, SD 57104
Phone: (605) 334-5000 • Fax: (605) 334-3656
Toll Free: (800) 843-7992

Mountain Division Office
7321 E 88th Avenue, Suite 200
Henderson, CO 80640
Phone: (303) 287-4656
Fax: (303) 289-1348