Petrified Lightning - Saharan Fulgurite Riker Box Specimen Size:Small Riker Box Specimen These specimens are relatively uniform

These specimens are relatively uniform in color

Unlike gold however

but on average they measure 6 to 10 millimeters along each edge

meaning this glass formed with water present that evaporated during its formation

Petrified Lightning - Saharan Fulgurite Riker Box Specimen Size:Small Riker Box Specimen These specimens are relatively uniformAbove: Front of the Specimen Card. When lightning strikes dry sand, the intense heat melts and fuses the silica creating tubes of rough glass called fulgurites. The process happens quickly, often trapping molecules from the surrounding atmosphere inside the walls of the impact tube. These natural time capsules allow scientists to study the composition of ancient climates. This specimen is a fulgurite collected in the Sahara Desert. Originally featured