Dims: 3.09x0.59x0.43" (7.84x1.49x1.10cm)
Wt: 0.14oz (4.0g)
Al Kufra, Libia
This is a fulgarite, an example of sand fused into a glass by lightning. Generally found in deserts, they are formed when a lightning bolt strikes the top of a sand dune, and the intense heat causes the sand to melt and fuse into an amorphous glass along the path of the lighting. Of course, the bolt quickly spreads into smaller and smaller branches, yielding a kind of fossil imprint of the lighting strike. The main strike can be many centimeters wide and meters long, but most fulgarites are a centimeter or two in diameter, and no more than tens of centimeters in length. This one is a very light-weight thin hollow tube, coated with the light-brown sand from which it formed.