Dragon Amulet

Two deep red garnet eyes (200 gp) turn pale if approaching danger. It also grows hot to touch in the presence of dragons or dragonkin (1 mile radius).
It is an antique Dwarfish piece in the distinctive style of Hvel-Runor. As a mundane item it would be worth about 750 gp; with its magical properties its value is around 1,500 gp.