- The regular Thunder Quartz Ring can be bought from Rosabeth of Melfia for 2,000 souls.
- The +1 version is found in the Iron Keep in a chest near the Belfry Sol bonfire.
- The +2 version is purchased from Royal Sorcerer Navlaan either by releasing him in human form, or completing all his assassinations and speaking to him for 8,400 souls.
- The +3 version is found on a corpse on a pillar in Shulva, Sanctum City, close to the Tower of Prayer bonfire. From the bonfire, step on the first raises pillar and walk forward to the second raised one. You will drop down into a gap between the pillars and the ring is on a corpse on the middle of the pillar. Having a Homeward Bone is recommended for getting back.
Grants a varying amount of defense against Lightning attacks, depending on the level of the ring.