Prismatic Gem

Prismatic Gems change the color of particle effects. They can be used on custom couriers with an Unusual effect (Socketed with an Ethereal Gem) as well as Terrorblade's Fractal Horns of Inner Abysm.

Legacy
Legacy color gems are displayed as Prismatic: Legacy (#,#,#) where # is the RGB value of the color.

Explain legacy info here -Lemon

Compatibility

 * All prismatic gems can be socketed into Terrorblade's Fractal Horns of Inner Abysm to change the colors of his head, chest, weapons, footprints, spells, and enemy death effects.

''Explain compatibility with ethereals here, make table? -Lemon''

History
Colors were previously changeable using Unusual Paint, a limited item. This was changed with the November 14, 2013 Patch.
 * All Unusual Paints were converted into Gem Packs.
 * Gem Packs contain a corresponding color gem and an Artificer's Chisel for creating a socket.