Its dimensions are  37x16x7 mm

in 1576 by Spanish explorers

The faces of the pyramids are rotated 45 degrees with respect to the prism faces and so plunge down into the prism edges

it measures 22x20x14

Fulgurite | Natural Lightning Impact Glass | 1.44 Grams | Sahara | SO24 Wavellite Its dimensions are 37x16x7 mmFulgurite, 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