Fulgurite (Lightning Glass, Blitzroehre Lechaterite), elongated shape
Surprising feature of nature created by lightning: (derived from the Latin root word "fulgur", meaning lightning) is formed by blossoming of electricity and silica when a thunder bolt of lightning strikes a dune of sand and such creates glassy crystal formations.
from Great Erg, Algeria:
It is a beautiful glassy silica (quartz) mineral (lechatelierite) fused in the heat from a lightning strike and locally melting the sand.
For more meteorites
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