Pillar coral

Pillar Coral is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "A real community of the pillar."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 62 gp, and item ID 31484.

View on OSRS Wiki

Pillar Coral shows an active flip setup with a margin of +251 gp and 82,754 trades over the last 24 hours.

At the buy limit of 13,000 every four hours, max profit per cycle is about 3.26m gp — high margin with healthy liquidity.