They can vary in size

Tektite can still be interesting because of the persistent mystery which has resisted clear explanation of their creation for generations of geologists

Weight:  31

analcime and microcline in a complex matrix in a spectacular shape

Name: Quartz Point

Fulgurite | Natural Lightning Impact Glass | 1.44 Grams | Sahara | SO24 Feldspar They can vary in sizeFulgurite, 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