igneous
Vesicular volcanic rock (likely pumice or scoria)
Vesicular volcanic rock; exact composition cannot be determined from the photo
AI-generated identification · may be incorrectCream to pinkish-brown, rough and highly porous, with irregular gas cavities; likely low density and dull luster. Hardness and mineral composition are not reliably identifiable from the image; pumice is commonly silica-rich, while scoria is typically basaltic.
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Physical properties
Cream to pinkish-brown, rough and highly porous, with irregular gas cavities; likely low density and dull luster. Hardness and mineral composition are not reliably identifiable from the image; pumice is commonly silica-rich, while scoria is typically basaltic.
Formation & geological history
Formed when gas-rich lava cooled rapidly, trapping bubbles; the specimen’s age and precise volcanic setting cannot be established visually.
Uses & applications
Pumice is used as an abrasive, lightweight aggregate, and horticultural material; scoria is used in landscaping, drainage, and construction aggregate.
Geological facts
The numerous holes are vesicles left by escaping volcanic gases. Pale color favors pumice, though lighting and surface weathering can make identification uncertain.
Field identification & locations
Look for very low weight and a glassy, frothy texture to distinguish pumice from darker, denser scoria; vesicular volcanic rocks occur in volcanic regions worldwide.
