08-03-2019
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which was used by early man to make arrowheads, is a naturally occurring glass

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kthompson86 kthompson86

08-03-2019

Obsidian was valued in the Stone Age cultures because, it could be fractured to produce sharp blades or arrowheads. Like glass, obsidian breaks with a characteristic conchoidal fracture. It was also polished to create early mirrors.

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