Fulgerite mineral specimen

Fulgerites mineral specimen

These Fulgerites are from the Sahara Desert. They are natural hollow glass tubes, 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.
Fulgerites are sometimes referred to as Petrified Lightning.

They are very, very cool, and a 'must have' for anyone with a collection of unusual specimens, or impactites.

Price: NZ$10.00
Select from available sizes