Topaz

Grokko found a topaz worth 10 gold pieces along with a diamond, sapphires, emeralds, pearls, rubies, an owl feather and Detlef's journal in Detlef's lair beneath Senneborn.

Ser Kobolwitz's scimitar has its blue-tinted hilt carved into the shape of an owl with glittering yellow topaz for eyes.