From publisher blurb:
Beware the Power of Stone!
For centuries, the mysterious Archivists have maintained records of wondrous deeds, places, and magic in the lands of Maere. This volume describes the extraordinary properties of two new minerals, aetherite and draconium, and details new magical items that can be crafted with them.
TWO SPECIAL MATERIALS AND A DOZEN MAGIC ITEMS
FULLY COMPATIBLE WITH THE PATHFINDER ROLEPLAYING GAME!