Crossword puzzle clue "worthless rock in mining"

Here are the possible solutions for worthless rock in mining clue

Answer
Clue
Relevancy
gangue
Clue
Worthless rock, in mining
Definition
(French) the worthless rock in which valuable minerals are found
ore
Clue
Rock worth mining
Definition
rock containing a valuable metal, also OWRE
gibraltar
Clue
The Rock of ___ (after translation, "The Rock of the Rock of Tariq")
ashheap
Clue
Worthless pile
ashheaps
Clue
Worthless mounds
asou
Clue
Not worth ___ (worthless)
Not worth --- (worthless)
avail
Clue
To no ___ (worthless)
Definition
to be of use or advantage to

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