Iron ore

Iron Ore is a free-to-play item on the OSRS Grand Exchange in the ores category.

In-game examine text: "This needs refining."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 10 gp, and item ID 440.

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Iron Ore currently has a flip margin of −1 gp, which isn't profitable to flip right now despite 3,331,441 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.