Umbral frag

Umbral Frag is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "This can be propagated in a coral nursery."

It has a Grand Exchange buy limit of 200 every four hours, a high alchemy value of 46 gp, and item ID 31515.

View on OSRS Wiki

Umbral Frag shows an active flip setup with a margin of +141 gp and 9,602 trades over the last 24 hours.

At the buy limit of 200 every four hours, max profit per cycle is about 28.2k gp — high margin with healthy liquidity.