thread-like white line running through the crystal

a mineral group known for its diverse range of colors

Its dimensions are  37x16x7 mm

Some rare examples have two rosettes conjoined in striking formations

and are the source of the best banded

Fulgurite | Natural Lightning Impact Glass | 1.44 Grams | Sahara | SO24 Wavellite thread-like white line running throughFulgurite, also known as fossilized lightning, are natural glass tubes or formations that are created by the heat of lightning strikes. When a lightning bolt hits the ground it generates temperatures of up to 30,000 Kelvin (over 53,000F), hotter than the surface of the sun. This intense heat melts the silica rich sand and fuses it almost instantly, forming hollow branching structures that solidify as they cool. In the Sahara Desert where thunderstorms