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Does obsidian have cavities

Updated: 8/20/2019
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12y ago

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It is a rarity but some Obsidian has been found with small Gas Bubbles in it which when chipped or broken it can have cavities. the Natural Museum in San Francisco, California, has been known to have some Samples for Viewing and study.

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12y ago
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Q: Does obsidian have cavities
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