Prism Stone (Dark Souls)

Prism Stones are consumable items in Dark Souls.

In-Game Description
Warm pebble emitting a beautiful phasing auraof seven colors, with a very rare eight. The rainbow stone does nothing special,but can serve as a path marker,and can be dropped off a cliff to judgeheight by the sound of descent. If a loud noise is heard upon its landing,then a fall off the ledge is surely lethal.