Connecting a modified welding transformer to a bucket of sand, Dwight Perry created complex figures of vitrified sand. Synthetic fulgurites are formed by drawing an electric arc under the surface of a medium such as sand. Copper clad carbon electrodes are brought together below the surface initiating an arc of plasma that radiates extreme heat, melting and vitrifying the surrounding sand. The modified welding transformer releases up to 2KV with a current limit of 2 amps.
Video of the experiment