This fulgurite weighs .630 grams or approx. 3.1 carats. It is a flat piece that is partially-hollow and has a good amount of surface area for the weight.
Fulgurites are formed when lightning strikes the silica-rich sand dunes
in the Saharan Desert. The same nomads who pick up meteorites, also
harvest these fulgurites. These have a bumpy, glassy texture and some
are hollow. Each one is different and represents natures glass-making
process. Your purchase includes a data label.
Refer to the photo. The black centimeter cube is shown for scale and is not included.