Adamant knife

Adamant Knife is a members-only item on the OSRS Grand Exchange in the bars category.

In-game examine text: "A finely balanced throwing knife."

It has a Grand Exchange buy limit of 11,000 every four hours, a high alchemy value of 39 gp, and item ID 867.

View on OSRS Wiki

Adamant Knife shows an active flip setup with a margin of +94 gp and 80,017 trades over the last 24 hours.

At the buy limit of 11,000 every four hours, max profit per cycle is about 1.03m gp — high margin with healthy liquidity.