Dragonstone

Dragonstone is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "This looks valuable."

It has a Grand Exchange buy limit of 11,000 every four hours, a high alchemy value of 6.0k gp, and item ID 1615.

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Dragonstone currently has a flip margin of −20 gp, which isn't profitable to flip right now despite 231,558 trades over the last 24 hours.

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