Glow-in-the-Dark Beholder Eyes
"A small white tree lives at the centre of yonder forest. Its leaves are a dark purple that contain powerful bioluminescent properties. I'll pay a pretty penny for a sample of those leaves, but watch out for the spriggans and ents - they don't like outsiders getting near it."
A pair of oval earrings. The earrings glow in the dark after UV exposure.