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is for
Obsidian
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Obsidian is a dark glass formed in the <a href="/l/lava">larval</a> flows of <a href="/v/volcano">volcanos</a>. Obsidian doesn't have a crystalline structure and can be broken into very thin pieces that can be used to make a very <a href="/s/sharp">sharp</a> cutting edge, spear tip or arrow head.
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Obsidian is a dark glass formed in the
larval
flows of
volcanos
. Obsidian doesn't have a crystalline structure and can be broken into very thin pieces that can be used to make a very
sharp
cutting edge, spear tip or arrow head.
John Atherton
/
CC BY-SA
