134 S. Main St.  
Cottonwood, AZ 86326   
T: 928.634.2655   
F: 928.639.3469
Although Cornerstone Materials is a new name, owner Don Blaser previously owned American Sandstone for nearly twenty years. Four years after selling his own company, Don reacquired his largest quarry and re-hired all of his previous employees.  Today, Cornerstone Materials, LLC, is once again a family-owned flagstone mining operation in Chino Valley, Arizona. Cornerstone Materials, LLC, is a family owned and operated flagstone 
mining operation in Chino Valley, 
Arizona, managed under Don't guidance 
by his son-in-law and daughter, Mike and 
Tammy Stezenski.

Cornerstone Materials quarries and supplies 
quality flagstone and veneer products to 
hundreds of stone dealers in all parts of the 
United States.Those dealers are their primary focus as they strive to offer the best customer service and maintain sufficient  material 
inventories on hand at all times.
We are happy to add Cornerstone's wide range of stone products to our growing range of offerings, and are particularly pleased to support a locally owned and operated company. 

Photos show installations using Cornerstone Materials products.