Strange rock (Herblore)

Strange rocks obtained by training Herblore are part of the Dahmaroc statue. 2 are required each to complete the statue each week. Strange rocks may be stored inside a statue collection bag.

Obtaining
Combining unfinished potions with secondary ingredients, including barbarian mixes; making unfinished potions; or by cleaning herbs.

It is recommended to clean cheap herbs, such as marrentill, while having the statue collection bag in inventory. The Herblore rock can be one of the fastest rocks to obtain by using this method.