Concrete Materials offers the highest quality selection of rock, sand and gravel. We wash and grade many of our aggregate products to meet appropriate specifications. One of our most unique high-quality aggregates: quartzite. Click on the individual listings below for product details:   Quartzite   Washed Natural Rock      Rip Rap        2" - 4"      Gabion Stone (4-10")        1½" x ¾"      3½" Down        ¾" x 3/8"      2½" x ¾" Railroad Ballast        3/8" x ¼"      1½" x ¾"          1¼" x #4 (SD Size #1)      - coarse aggregate/PCC paving   Sand & Gravel      1" x #4 (SD Size #1      - ASTM C33 #57)      - coarse aggregate/PCC        Concrete sand      ¾" x #4 (ASTM C33 #67)        Mason (plaster) sand      5/8" x #4 (SD Size #5)        Golf sand      3/8" x #8      - cover aggregate, SD Type 2A        1" base course gravel      #4 x #20        ¾" gravel cushion      Manufactured sand        Washed sand      1" Down (IA Class A)          Select Fill (as available)   Decorative      Surge        Landscape boulders          Grey limestone Recycled material        Brown limestone      Crushed asphalt        White limestone      Crushed concrete        Salt & Pepper Granite          Western Red Granite          Western Sunset          Cobbles/Skippers