Fulgurite- 15cm-22g! -Lightning Fused Sand from Niger

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NEW DISCOVERY , from my last expedition of November 2006 in NIGER Perfect Tube, nice shape It is 15 cm long and about 2 cm wide.It is 22g!All my fulgurite specimen are sold under 1$/gram, very cheap for so rare minerals!!Fulgurite is the varietal name given to fused Quartz, Si02, which has been fused by the action of lightning striking the Earth and locally melting the sand. The best known Fulgurites are found in Quartz sands, w the Fulgurites take the form of tubes, sometimes exceeding a half inch or more in diameter. This type of formation is called a Sand Fulgurite. As the lightning strikes the Earth and courses downward through the sand, the sand is instantly super heated (i.e., melted and fused). After cooling, glass-like hollow tubes (Fulgurites) can sometimes be located beneath the surface of the sand, generally decreasing in diameter and sometimes branching as they descend, sometimes extending for several feet. The outer surfaces sand fulgurites are often rough with adhering, unfused Quartz sand grains. The inner surfaces and openings of the tubes are usually smooth and glassy, in some specimens resembling an applied glaze, sometimes with blister-like bubbling present. Rock Fulgurites are formed when lightning strikes the surface of a rock, melting and fusing the surface, and sometimes the interior of the rock. The melting read more

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