Prism Stone | Dark Souls Wiki

Prism Stone
Warm pebble emitting a beautiful phasing aura of 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 judge height by the sound of descent. If a loud noise is heard upon its landing, then a fall off the ledge is surely lethal.

Prism Stone is a Consumable in Dark Souls.

Prism Stone Usage

• Used to make breadcrumb trails, or to mark areas already visited in confusing places.
• Used to determine the height of a fall. Listen to the sound of the stone hitting the ground. If it's loud, the fall will be fatal.
• Trade one to Snuggly for a Demon Titanite.

Prism Stone Location

• Sold by Undead Merchant (Female) for 10 souls.
• Sold by Patches the Hyena for 10 souls.
• Sold by Hawkeye Gough for 10 souls.
• Treasure x20: Chest in The Duke's Archives, beneath the staricase that leads to the Crystal Cave.
• Drops from Vagrants, specifically the White Good Vagrant. (Depths, Undead Burg, Undead Parish, Painted World of Ariamis, Darkroot Garden, Darkroot Basin, The Catacombs, Tomb of Giants, The Great Hollow, Ash Lake, Demon Ruins, Lost Izalith, Sen's Fortress, Blighttown, Anor Londo, New Londo Ruins Lower, New Londo Ruins Upper, The Duke's Archives, Crystal Cave, Northern Undead Asylum, Kiln of the First Flame  and Royal Wood)
• Video Location Timestamp 32:22

Eighth color testing

Per the item description there are eight colors of prism stones. Testing from multiple persons does reveal eight colors. Testing from two sources yielded:

• Purple
• Yellow
• Green
• White
• Red/Orange
• Light Cyan
• Pink
• Blue
• Orange/Pink
• Red
• Slightly different green