Libian desert glass (LDG). Impactite. - 34 g

Libyan Desert Glass is an impactite, meaning it is the result of a meteorite impact on Earth, which occurred about 29 million years ago, leaving fragments over areas of tens of square kilometers along the Libya–Egypt border.
This mysterious glass has always fascinated human civilizations; it was worked and used to make lithic tools during the Pleistocene.
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Thank you for your interest.