Marble block

Marble Block is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "A beautifully carved marble block."

It has a Grand Exchange buy limit of 11,000 every four hours, a high alchemy value of 150.0k gp, and item ID 8786.

View on OSRS Wiki

Marble Block shows an active flip setup with a margin of +928 gp and 4,428 trades over the last 24 hours.

At the buy limit of 11,000 every four hours, max profit per cycle is about 10.21m gp — high margin with healthy liquidity.