Please Excuse the Dust. Our website is currently under construction.

      is the on-line home of Tri-State Materials, located near Diamond Valley Lake, in Winchester California. Tri-State Materials offers a large selection of products ranging from decomposed granites, cobbles, and boulders, to flagstones and other exotic specimens. 

              Be sure to check the Frequently Asked Questions (FAQ) page for any questions you might have, or feel free to contact us with any questions not answered or clearly detailed on the site.