natural black obsidian volcanic glass raw rock mineral specimen white background |
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| navigate by keyword : obsidian stone mineral volcanic glass rock black natural geology specimen crystal raw shiny dark smooth macro detailed texture reflective rough surface glossy solid isolated sharp hard artifact inorganic igneous gemstone pebble transparent polished collectible precious nature block silicon silicate lava magma fractured sharpness breakable museum discovery geological science luxury |
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| Natural Black Obsidian Volcanic Glass Raw Rock Mineral Specimen on White Background. |
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