Question: which one of the following is a carbonate ore?
Answer: Other relatively common carbonate minerals serve as metal ores: siderite, for iron; rhodochrosite, for manganese; strontianite, for strontium; smithsonite, for zinc; witherite, for barium; and cerussite, for lead. Most such rock-forming carbonates belong to one of two structure groups—either calcite or aragonite.