King Tut's meteoritic glass scarab

Yellow-green glass carved into a beetle-shaped ornament and found on a necklace worn by the ancient King Tutankhamen was created by a meteorite fireball, according to new research. . . The geologists determined the scarab was made out of natural desert glass for the king, who reigned from 1333 to 1323 B.C.

Such glass is only found in the Great Sand Sea of the eastern Sahara desert. With a silica content of 98 percent, it is the purest known glass in the world.