Moon rune

Geralt starts the game with one moon rune. Later, they can be purchased from a number of merchants, including the mysterious merchant, Haggard or Thorak in Vergen, or Falas, the Incredible Lockhart or Polycarp of Rinde during Chapter III.

To use a rune, Geralt simply drags it over to one of the rune slots on a suitable sword in the inventory panel.

Moon runes can also be used to craft blue, red or yellow meteorite ore, though given that the price of a rune is significantly higher than that of a piece of ore, it seems a poor use of the rune.

Locations

 * In Chapter III, found on the corpse between the 2nd and 3rd archways in the kikimore queen's lair.
 * In Chapter IV:
 * found in the chest on Black Tern Island (near the circle of elements).
 * received from The Rock, one of three possible rewards.
 * In Chapter V
 * sold by the fence.
 * found in a chest in the courtyard of the old manor.
 * found in Agnes of Glanville's trunk.

Rune des Mondes Σεληνιακός ρούνος Rune de lune Runa della luna Runa księżyca