Robust glass is a thick type of glass used for creating potion flasks. It is created by melting red sandstone in The Sacred Forge, which can be found between the Mage Bank and the Wilderness Agility Course.
Robust glass is a thick type of glass used for creating potion flasks. It is created by melting red sandstone in The Sacred Forge, which can be found between the Mage Bank and the Wilderness Agility Course.