chalcedony rhyolite volcanic rock
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chalcedony rhyolite volcanic rock |
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| navigate by keyword : art bead boulder chain chalcedony contexts crystals differs erupted fine grained food formation formed gemstone geode geology grain groundmass igneous iron jewellery larger lava may metal mineral mineralogy necklace origin phenocrysts porphyritic rhyolite rock rocks scientific sculpture shortened silica rich silver soil stone texture volcanic volcanics volcano wood |
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| Rhyolite is the most silica-rich volcanic rock. May be porphyritic, containing larger mineral crystals (phenocrysts) in an otherwise fine-grained groundmass. Volcanic rock is a rock formed from lava erupted from a volcano. It differs from other igneous rock by being of volcanic origin. |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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