DCHP-1 Online
free-milling † Mining 
adj. of ore, not requiring costly treatment for recovery of the gold.
See also: free gold
- 1910 . . . they knew of a ledge of high-grade, free-milling quartz somewhere out there in the Land Back of Beyond.
- 1926 To a mining man it would have been a sample of high-grade, free-milling gold ore.
- 1951 The ore is free milling.
- 1910 . . . they knew of a ledge of high-grade, free-milling quartz somewhere out there in the Land Back of Beyond.