Sapphire amulet (u)

Sapphire Amulet (u) is a free-to-play item on the OSRS Grand Exchange in the other category.

In-game examine text: "It needs a string so I can wear it."

It has a Grand Exchange buy limit of 10,000 every four hours, a high alchemy value of 540 gp, and item ID 1675.

View on OSRS Wiki

Sapphire Amulet (u) shows an active flip setup with a margin of +23 gp and 32,497 trades over the last 24 hours.

At the buy limit of 10,000 every four hours, max profit per cycle is about 230.0k gp — high margin with healthy liquidity.