Sapphire ring

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

In-game examine text: "A valuable ring."

It has a Grand Exchange buy limit of 10,000 every four hours, a high alchemy value of 540 gp, and item ID 1637.

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Sapphire Ring currently has a flip margin of −4 gp, which isn't profitable to flip right now despite 137,809 trades over the last 24 hours.

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