White berries are secondary herblaw ingredients. There are 2 ground spawn's of this item found in level 36 and 39 wilderness, in the south-eastern portion of Red Dragon Isle. They are also occasionally dropped by Chaos Druid Warriors and Salarin the Twisted.
The berries take about 30 seconds to spawn on an empty server. Thus it is more efficient to choose one spawn to pick up rather than attempting to walk back and forth from one to the other, unless Telekinetic grab is used, however this is not recommended. Players who choose to collect White berries from Red Dragon Isle should be prepared to defend themselves against PK'ers and Red dragons. Equipping an Anti dragon breath Shield while collecting these is recommended.
Selling these items can be a very quick way to make money. They are used to make both regular and Super Defense Potions at level 30 and 66 herblaw respectively. They are typically in high demand, and players with a high herblaw level are likely willing to purchase them for many coins each.