Citrine

Citrine is a mineral. It is a variety of quartz that ranges in color from pale yellow to brown caused by iron-based impurities.

Source
Citrine is a mineral that can be found in Iron Deposits, Gold Veins, Mithril Deposits, and Truesilver Deposits, as well as in treasure hoards.

As an ingredient
Citrine is used in the following recipes:

As a quest objective
Citrine is needed for the following quest: