07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria
07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria 07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria 07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria 07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria 07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria 07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria 07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria 07303 -  Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria

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07303 - Top Rare 2.02 Inch Fulgurite ("Petrified lightning") Collected in Algeria

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Species
Fulgurite ("Petrified lightning")
Age
-
Location
Unknown place in Algeria Desert
Formation
Fused sand when lightning discharges into ground
Size
51.2 mm   •    in
Weight
2 g   •    oz
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Description

Fulgurites are natural tubes, clumps, or masses of sintered, vitrified, and/or fused soil, sand, rock, organic debris and other sediments that can form when lightning discharges into ground. They can therefore be referred to as petrified lightning. They are classified as a variety of the mineraloid lechatelierite, although their absolute chemical composition is dependent on the physical and chemical properties of the usually granular-crystalline material providing an electrically and thermally conductive dissipation network for lightning-facilitated energy transfer. They are commonly hollow and/or branching assemblages of glassy, protocrystalline, and heterogeneously microcrystalline tubes, crusts, slags, vesicular masses, and clusters of refractory materials that often form during the discharge phase of lightning strikes propagating into silica-rich quartzose sand, mixed soil, clay, or other sediments. Fulgurites are homologous to Lichtenberg figures, which are the branching patterns produced on surfaces of insulators during dielectric breakdown by high-voltage discharges, such as lightning.

Specimen collected in Algeria, unknown place in the Occidental Sahara Desert.

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