Obsidian stone specimen for education. Obsidian is a naturally o
Obsidian stone specimen for education. Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly.
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agateagearrowarrowheadbackgroundballbeautifulblackbladebrittlecavecavitycrystalcuttingdarkearlyeruptionextrusivefelsicflowsfracturegeodegeologicgeologyglasshardjasperlavamaterialmineobsidianonyxopaqueornamentalpebblepiercingpolymerizationpreciousprehistoricrocksharpsmokyspecimenstonetexturetoolingtranslucentvitreousvolcanicvolcano
Username: Kampwit
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Image ID: 105911605