Vethis crystal comes out of the coarse veins of the Korrath, in the same ground as the gemstones. Vethis mines the best of it anywhere.

A spell put into Vethis crystal keeps running for years instead of hours. Every street lamp, message relay, and public fountain on the Logathriad Sea is built around a piece of it.

The magical standard was worked out around these crystals, so every lamp and relay in the world is designed to use only this crystal.