Fulgurite is a product of lightening. It is formed by the fusion of sand from a lightning strike. Mr. Hawthorne finds these on the beach in the four-wheel drive section of the northern Outer Banks.
Mr. Hawthorne found one torpedo-shaped piece encrusted with shells that actually had a bomb in it. Emergency management came and took it from us. I imagine it's sitting on Sandy Sanderson's mantel now.