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Mineral containing valuable metal (3)

Solution has appeared in 4 crosswords (2 across and 2 down):

• Quick crossword No 16,739 — 2023-12-30 00:00:17
  2D: Deposit that's worth mining (3)
• Quick crossword No 16,372 — 2022-10-26 23:00:13
  10A: Natural material from which valuable metals can be extracted (3)
• Quick crossword No 15,541 — 2020-02-28 00:00:01
  8A: Natural material from which metals can be extracted (3)
• Quick crossword No 15,202 — 2019-01-28 00:00:47
  2D: Mineral containing valuable metal (3)