Uncut sapphire

Uncut Sapphire is a free-to-play item on the OSRS Grand Exchange in the other category.

In-game examine text: "This would be worth more cut."

It has a Grand Exchange buy limit of 10,000 every four hours, a high alchemy value of 15 gp, and item ID 1623.

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Uncut Sapphire currently has a flip margin of −1 gp, which isn't profitable to flip right now despite 1,170,825 trades over the last 24 hours.

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