igneous
Pink volcanic pebble, likely scoria or vesicular rhyolite
Uncertain from the image; possibly vesicular felsic volcanic rock (rhyolite)
AI-generated identification · may be incorrectSmall, rounded, salmon-pink pebble with scattered dark pits and a dull, fine-grained surface. Hardness and specific gravity cannot be determined visually; the pits may be gas-bubble cavities.
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Physical properties
Small, rounded, salmon-pink pebble with scattered dark pits and a dull, fine-grained surface. Hardness and specific gravity cannot be determined visually; the pits may be gas-bubble cavities.
Formation & geological history
Likely formed when gas-rich lava cooled, leaving vesicles, then acquired its rounded shape through transport or tumbling. Its geological age and exact origin cannot be established from the photograph.
Uses & applications
Primarily a decorative or collecting pebble; volcanic rock may also be used as aggregate or landscaping stone.
Geological facts
The pink color may reflect iron-bearing minerals or alteration, but color alone does not identify the rock. Scoria is usually darker and notably lightweight, so a closer examination would help distinguish it from other volcanic rocks.
Field identification & locations
Check whether the pits are genuine cavities and whether the pebble feels unusually light; fresh surfaces and hardness testing can help identify it. Similar volcanic rocks occur in regions with past or present volcanism.
