Scoria identification and geology

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• Pumice
• Basalt
• Vesicular rocks — Place this specimen in a broader field-identification workflow.
• Pumice vs Scoria — Compare observable properties and safer field tests.

Sources, scope & corrections

These authoritative resources support category-level nomenclature, terminology, identification methods, and safety. When a specimen-specific safety warning appears, the public-health source listed here directly supports that precaution. They are not line-by-line citations for every other property on this entry, and natural specimens vary.

Editorial owner

GeoMiner

Last updated

2026-03-30T14:38:12.238695+00:00

Review status

Published; not independently peer-reviewed

• Rocks — U.S. National Park Service. Authoritative overview of rock groups, the rock cycle, and geologic processes.
• Can you identify my rock or mineral? — U.S. Geological Survey. Identification limitations and routes to in-person professional verification.

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Common questions

What is Scoria?

Dark, vesicular volcanic rock denser than pumice. Forms cinder cones and is ejected during basaltic eruptions.

How can you identify Scoria?

Compare several properties rather than relying on colour alone. This entry records rock type: Igneous Extrusive; texture: Vesicular; grain size: Fine to glassy; common minerals: Volcanic glass, Plagioclase, Pyroxene, Olivine. Confirm an important identification with additional field tests or qualified laboratory work.

How does Scoria form?

Forms when gas escapes from mafic to intermediate lava during Strombolian eruptions, creating vesicular fragments.

Where is Scoria commonly found?

Found around cinder cones worldwide; Hawaii, Iceland, Italy.

What is Scoria commonly confused with?

Scoria may be confused with Pumice, Basalt, Volcanic Cinder. Compare multiple diagnostic properties because colour and surface appearance can overlap.