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#obsidian #volcanic glass #glassy texture #extrusive rock #felsic rock #conchoidal fracture

⚫️💎

#obsidian #volcanic glass #black gem #dark glass #natural glass

🌋⚫️⏳

#obsidian #volcanic glass #geological time #ancient rock #formation

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#obsidian #volcanic glass #black rock #glassy rock #igneous rock

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#obsidian #volcanic glass #igneous rock #black glass #natural glass #shiny rock