Conchoidal Fracture

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Why is obsidian so useful for tools?The ancient inhabitants of many continents knew the properties o

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daily-volcanology:Not gonna say it again, folks!This is a mineralThis is notThank you for the consid

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daily-volcanology:Not gonna say it again, folks!This is a mineralThis is notThank you for the consid

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pacificnorthwitch:Obsidian has a special place in my heart - having grown up in Central Oregon, wher

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pacificnorthwitch:Obsidian has a special place in my heart - having grown up in Central Oregon, wher

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pacificnorthwitch:Obsidian has a special place in my heart - having grown up in Central Oregon, wher

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pacificnorthwitch:Obsidian has a special place in my heart - having grown up in Central Oregon, wher

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thosewhocando:Conchoidal fractures in very fine grained limestone at Bruce Peninsula National Park.W

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Why is obsidian so useful for tools?The ancient inhabitants of many continents knew the properties o

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