high-grade ((adj.))

Mining

DCHP-1 (pre-1967)

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adj.

denoting or containing gold-bearing ore of a high assay value.

Quotations

1910

. . . they knew of a ledge of high-grade, free-milling quartz somewhere out there in the Land Back of Beyond.

1913

. . . Klondike . . . now considered a fairly good creek with, if not high-grade dirt, plenty of paying stuff.

1958

At one property The Northern Miner was shown no less than 10 sample bags containing high grade gold ore that has been recovered this year.