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Geochemical characterization of nine samples of Libyan Desert Glass (LDG) based on assay of more than forty elements by instrumental neutron and photon activation analyses has pointed to quartz sand cemented by aluminosilicates and Fe, Ti oxides as LDG parent materials. Contamination by extraterrestrial material has not been evidenced in studied LDG samples, but depletion of volatile elements indicating their evaporation during the impact process was noticed. Authors support the common concept of LDG formation by an impact into Cretaceous Nubian sandstones, derived from Proterozoic crystalline basement and possibly weathered and redeposited from alluvial or shallow water marine environments.