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Pure obsidian actually has a glassy texture (grain), with no discernible crystalline structure.

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15y ago
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5mo ago

Obsidian typically has a smooth, glassy texture due to its quick cooling process when formed from volcanic lava. It has a conchoidal fracture pattern, which means it breaks with curved, shell-like shapes. The grain shape of obsidian is generally fine-grained due to its rapid cooling.

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15y ago

no grain shape

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Q: What is obsidians grain shape?
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