Volcanic glass (obsidian) knife I made
https://ift.tt/3jdnz7i via /r/interestingasfuck https://ift.tt/3xhMqM1
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Quartz crystal cave found in an abandoned silver mine in Spain
https://ift.tt/3jnm3Og via /r/interestingasfuck https://ift.tt/3bekdwo