Fulgurite, glassy tubes formed by lightning striking sand. Each one is unique, priced per piece, fragile.

Fulgurites (from the Latin fulgur meaning thunderbolt) are natural hollow glass tubes formed in quartz sand, or silica, or soil by lightning strikes. They are formed when lightning with a temperature of at least 1,800 °C (3,270 °F) instantaneously melts silica on a conductive surface and fuses grains together; the fulgurite tube is the cooled product. This process occurs over a period of around one second, and leaves evidence of the lightning path and its dispersion over the surface.

Approximate size: 1.75" x .3" (4.4cm x 1cm)