free-milling†

Mining

DCHP-1 (pre-1967)

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adj.

of ore, not requiring costly treatment for recovery of the gold.

Quotations

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.