Types
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.
Clinopyroxenites, Orthopyroxenites and Websterites
Features
Acidic in nature, Available in lots of colors
Generally rough to touch, Host rock for Diamond, Is one of the oldest rock
Archaeological Significance
Monuments
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Famous Monuments
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Sculpture
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Famous Sculptures
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Pictographs
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Petroglyphs
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Figurines
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Fossils
Absent
Absent