With an colossal force and an enormous heat melt the sand, splashed it up in the air and spread it over an 6000 km2 sized area in West Egypt dessert near the Libyan border. The impact site has not been found but is likely deep under the sand. Libyan dessert glass consist mainly of sillicon dioxide (98% SiO2 and 2 % Al2O3).
About 10 000 years ago the libyan dessert glass was discovered as artefacts. The old Egyptians used libyan glass as gemstones and in Tutenkhamon's amulet is an carved scarabe of libyan dessert glass.