Nirncrux, commonly called red brittle, shake stone or miner's bane, is a red stone found only in Craglorn. In its raw form, it releases a poisonous gas when cracked which can cause symptoms ranging from nausea, body tremors, and disorientation to convulsions, slurred speech, memory loss and death. The Nedes learnt how to harness its ability to absorb and distribute Aetherial energy.
Nirncrux is found naturally in a solid form, as veins running through denser rock throughout the upper region of Craglorn, and sometimes as grains and nuggets along river beds and at the base of hills and mountains. In this form, it is brittle and flaky, resists most acids, and does not tarnish when exposed to air or water. However, it is not dense enough or strong enough in this form to create weapons or armor.
When crushed into a powder or dust, the Aetherial energy can be released from each grain of dust using an ancient Nedic ritual which can be used in potions and elixirs. The Iron Orcs utilized crushed nirncrux in ink to create power-enhancing runes right into the flesh of trolls and welwa, they also used nirncrux in the armor worn by these creatures, as it boosted the toughness and power of the armor. When the runes and armor were combined, it caused the creatures to become infused with pure nirncrux, resulting in great power. They also washed the trolls in nirncrux-infused mud. The Scaled Court also used this form of nirncrux to create the Mantikora in spawning pools by mixing in nirncrux.
The Reachmen Dreadhorn Clan used the Bloodroot Forge, an ancient Nedic forge in the Jerall Mountains, to infuse themselves with nirncrux, iron, and blood, to become blood-forged. Their shamans also painted symbols using nirncrux powder and blood.
Nirncrux is so prized by the miners of Craglorn that it is conveyed in special bowls.
- Ahmih's dialogue
- Timmon Junciennes' dialogue
- Nirncrux: A Study — Mendan Flot, Regent of Roiling Concoctions
- Little Leaf's dialogue in ESO
- The Care and Feeding of Trolls — Gulzog the Butcher
- It Lives! — Boward, Regent of Wriggling Nightmares
- Nicolard's Notes on Ruin Origins — Nicolard Lia
- Nirncrux bowl description in ESO