Gauthier
- French limestones producer, exploits its own french quarries of stones like as Buxy goulot, Comblanchien, Combe brune, or Pierre de Nod for slabs and tiles.
- http://www.gauthier-france.com

PIEDRAS International
- Operates in conjunction with stone quarriers in France, Spain, and in Portugual. Supplies over 30 different types of limestone.
- http://www.piedrasintl.com/

TransMineral USA
- Importers of natural hydraulic lime products and distributors of interior-exterior commercial and residential finishes.
- http://www.transmineralusa.com/

H and S Whiting, Inc.
- Limestone crushing facility that supplies calcium carbonate to a variety of industries.
- http://www.hswhiting.com/

Meckley's Limestone Products, Inc.
- Construction limestone, agricultural limestone and bitumious concrete.
- http://www.meckleys.com/

Bybee Stone
- Indiana limestone, cut by skilled craftsman, for building projects of all sizes and types.
- http://www.bybeestone.com/