Obsidian
$25
Black obsidian is a naturally occurring volcanic glass formed from rapidly cooled lava, commonly sold as polished specimens, rough rocks, or carved items for collectors and hobbyists.
Estimated value as of 2026 · Source: https://newmoonbeginnings.com/black-obsidian-freeform-polished-obsidian-stone-st…
Fun Fact
Obsidian was used by ancient civilizations to create sharp tools and arrowheads due to its conchoidal fracture pattern, producing edges sharper than modern surgical steel.
Price History
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