Sapphire amulet

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

In-game examine text: "I wonder if I can get this enchanted."

It has a Grand Exchange buy limit of 10,000 every four hours, a high alchemy value of 540 gp, and item ID 1694.

View on OSRS Wiki

Sapphire Amulet shows an active flip setup with a margin of +322 gp and 13,331 trades over the last 24 hours.

At the buy limit of 10,000 every four hours, max profit per cycle is about 3.22m gp — high margin with healthy liquidity.