The impressive looking block sculptures that you see above are what are called Lichtenberg figures. Jake Von Slatt explains how the process works:

Stoneridge Engineering creates these Lichtenberg figures by using a particle accelerator to create a charge cloud inside of a highly insulating block of acrylic and then discharging that cloud by poking it with what is essential a nail in a board connected to ground.

When the electricity is discharged it vaporizes acrylic that is in its path, leaving intricate trails back to the nail. The results are impressive and better yet, they are reasonably priced.

Prices: Lichtenberg Figures from Stoneridge Engineering start from about $25 and go up to around $400, but there are a few options which will have you spending a little bit more. [Stoneridge Engineering via Steampunk Workshop]

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