Minerals / Fulgarite, Silica var.

This specimen is a fulgarite,  which has been created by the action of lightning. When lightning strikes the ground it vaporizes the sediment, soil, or sand in the immediate area, creating tubes with a smooth interior.  Fulgarites can be several meters long, and sometimes are branched. This particular fulgarite from the U.S.A. is the partial tube of a sand fulgarite.  Sand fulgarites  are likely to be a silica rich mineraloid, lechatelierite 

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