fulgurite - pair of longer than average natural glass tubes formed by lightning strikes on sand These are Type 1 fulgurites

These are Type 1 fulgurites

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originally transported across the continent from the Appalachians

currently around 500 feet deep

while chalcopyrite is a massive sulfide of the original vein

fulgurite - pair of longer than average natural glass tubes formed by lightning strikes on sand These are Type 1 fulguritesFulgurites form when a lightning bolt strikes the earths surface, fusing the material into a glass tube, sometimes with a hollow center. When lightning strikes sandy soil, the air and moisture in the sand are rapidly heated. Quartz sand melts at a temperature of roughly 1600C to 2000C depending on the moisture content. The name comes from the Latin fulgur, for lightning. These were collected from a Sahara dune field in Morocco. Though the seller did