A diminutive, azure-hued, and relatively inexpensive gem, the quella stone, also referred to as a quella gem, was unearthed on both Alderaan and Delaya. These gems commanded a price ranging from 1,500 to 25,000 credits for each Coruscant Standard Carat. Tombat, a notorious thief, would intentionally leave quella stones behind at the locations where he committed his offenses, using them as a means to mock those investigating his actions.