Leading U.S. nonfuel mineral by value in 2025 at $26.8 billion — 24% of total nonfuel output (MCS 2026).
Primary uses
Roadstone, cement raw feed, railroad ballast
Vulcan Mideast district
ALVulcan Materials · 420 crew · Carbonate quarry
TwinGeorgetown / Hunter (cluster)
TXMartin Marietta · 380 crew · Edwards limestone
TwinTexas Crushed Stone — Georgetown
TXTexas Crushed Stone · 220 crew · Edwards limestone
TwinLuck Stone — Richmond belt
VALuck Stone · 260 crew · Granite / gneiss quarry
TwinKnife River — Willamette
ORKnife River (MDU) · 190 crew · Alluvial gravel
TwinHeidelberg — southeastern PA
PAHeidelberg Materials · 340 crew · Carbonate / diabase
TwinCEMEX Victorville
CACEMEX USA · 280 crew · Limestone kiln feed
TwinHeidelberg Midlothian
TXHeidelberg Materials · 220 crew · Austin Chalk kiln feed
Twin