igneous
Scoria
Vesicular basaltic or andesitic volcanic rock
AI-generated identification · may be incorrectHardness varies from 5 to 6 on the Mohs scale. Colors range from reddish-brown to dark gray or black due to iron oxidation.
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Physical properties
Hardness varies from 5 to 6 on the Mohs scale. Colors range from reddish-brown to dark gray or black due to iron oxidation.
Formation & geological history
Formed through rapid cooling of gas-rich basaltic lava ejected from volcanic vents, trapping gas bubbles.
Uses & applications
Commonly used in landscaping, gas barbecue grills, lightweight aggregate in concrete, and personal care as a pumice-like abrasive stone.
Geological facts
Scoria is similar to pumice, but it has larger vesicles and thicker walls, causing it to typically sink in water.
Field identification & locations
Easily identified by its rough, vesicular, sponge-like texture and reddish or dark color. Found worldwide near volcanic regions.
