|Released||25 July 2019 (Update)|
|Destroy||You can obtain more tephra by mining it in Zalcano's prison.|
|Examine||This needs refining.|
|High alch||0 coins|
|Low alch||0 coins|
Tephra are fragmental materials mined from rock formations within Zalcano's prison beneath Prifddinas, granting 35 Mining experience per tephra mined. Rock formations that are glowing will yield tephra at a much faster rate. The Varrock armour's double ore mining effect works here as well.
Crystal shards can rarely be obtained while mining tephra.