Volcanic ash

Volcanic Ash is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "One of the ingredients for making ultra compost."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 120 gp, and item ID 21622.

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Volcanic Ash currently has a flip margin of +0 gp, which isn't profitable to flip right now despite 1,546,051 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.