igneous
Likely vesicular volcanic rock (possibly pumice or scoria)
Vesicular volcanic rock; exact identification requires a fresh, close-up sample
AI-generated identification · may be incorrectGray, fine-grained surface with scattered dark pits or cavities. If the cavities are gas bubbles, it is vesicular; hardness, luster, and density cannot be reliably determined from the image.
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Physical properties
Gray, fine-grained surface with scattered dark pits or cavities. If the cavities are gas bubbles, it is vesicular; hardness, luster, and density cannot be reliably determined from the image.
Formation & geological history
Forms when gas-rich lava cools and traps bubbles during eruption; age and specific volcanic setting are unknown.
Uses & applications
Pumice is used as an abrasive and lightweight aggregate; denser scoria is used in landscaping and construction fill.
Geological facts
Pumice can be light enough to float, while scoria is typically heavier and darker.
Field identification & locations
Look for a porous, glassy or rough texture and low density; the pictured surface could also be weathered or processed stone, so the rock type is uncertain. Vesicular volcanic rocks occur in volcanic regions worldwide.
