Libyan dessert glass or gold Tektite

Libyan desert glass or 'gold Tektite' is natural glass that is found at the border between Egypt and Libya in the desert. It originated about 28 million years ago by a massive meteorite impact. The released heat melted the sand surface into glass. At the time of the Pharaohs, it was seen as a valuable gemstone and even today still highly in demand by collectors.