Mysterious Gemstones Found In King Tut's Tomb

Carter identified the gemstone at first as chalcedony, a common variety of the mineral quartz

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LDG is composed of almost pure silicon-dioxide

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It is among the rarest minerals on Earth

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The origin of the dessert glass has long eluded geologists

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The supposed crater, tentatively named El Bahr Crater, is approximately 327 meters wide

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The shape resembles a typical impact crater, like the famous Meteor Crater in Arizona

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