Sapphire necklace

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

In-game examine text: "I wonder if this is valuable."

It has a Grand Exchange buy limit of 18,000 every four hours, a high alchemy value of 630 gp, and item ID 1656.

View on OSRS Wiki

Sapphire Necklace shows an active flip setup with a margin of +6 gp and 1,233,732 trades over the last 24 hours.

At the buy limit of 18,000 every four hours, max profit per cycle is about 108.0k gp — high margin with healthy liquidity.