Ballast

Arizona Rock & Mineral Co.
http://www.rrscenery.com
Genuine stone ballast, rip-rap, scenic rock, earth, paving, mining supplies, pigments and foliage.

Brennan's Model Railroading
http://www.brennansmodelrr.com
My flagship product, Brennan's Better Ballast, was born out of a quest to find a "better" ballast than any of the commercially available products. Since it's introduction in 1997, the product line has expanded to include Brennan's Natural Ground Cover materials, two Weathering Sets, and the ultra-realistic Chain Link Fence Kit and the...

Chuck's Ballast Supplies
http://www.chucksballast.com
Suppliers of genuine ballasts and other natural materials to the railway modeler. Chuck's products are produced from material gathered from railway quarries and other sources guaranteeing authentic and historically correct material for the scenery on your layout. Forget the scenery paints, colored plasters and artificial scenery covers.

Color Canyon Materials
http://www.colorcanyonmaterials.com
You can count on CCM for the finest in "dust free" scaled materials for your scale project. The natural rock is crushed and screened to four grades.