Quartz crystal cave
The quartz crystal cave is an unofficial name given to a dome-shaped cave that supposedly exists beneath Lumbridge, outside the borders of Dorgesh-Kaan. The cavern earns its name from the large quartz deposits present within it, giving it a distinctive appearance.
The cavern is not featured in-game, but is a key location in the Lores and Histories story The Chasm of Lights. Zanik and Dorgan, two Dorgeshuun cave goblins, visited the cave while exploring the caves outside Dorgesh-Kaan.