Polished crystal

One of these crystals is found in Philippa Eilhart's quarters in her hideout at Est Tayiar. This crystal is broken and contains a message that Yennefer and apparently also Triss can decipher.

A second is located by the old signal tower near Kaer Morhen, used to open a portal.

Associated quests

 * Redania's Most Wanted
 * Scavenger Hunt: Wolf School Gear