Item from The Wheel of Time by Robert Jordan
Ancient ter'angreal that allow travel between worlds — not just places, but parallel realities where the Pattern wove differently.
Portal Stones allow travel to parallel worlds — alternate realities where events unfolded differently. Rand used them to transport his party, experiencing lives in other worlds where different choices led to different outcomes (the 'flicker' experience). They predate the current civilization and their full capabilities are not understood.
Tall standing stones covered in symbols, found in remote locations across the Westlands. They predate the Age of Legends. The symbols correspond to destination worlds and locations.
Also known as: Portal Stones