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Pantellerite identification and geology

Pantellerite rock reference specimen

Highly evolved peralkaline rhyolite with dark color despite felsic composition. Rich in sodium and iron. Texture: Aphanitic to glassy. Rock type: Igneous Extrusive. Grain size: Fine to glassy. Minerals present: Anorthoclase, Aegirine, Aenigmatite, Quartz. Formation: Erupts from peralkaline volcanic systems in rift settings as highly evolved alkaline magma. Common geological settings: Pantelleria Italy , East African Rift, Iceland; found in rift-associated volcanic settings. Common look-alikes and related entries: Rhyolite, Comendite, Obsidian.

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
2026-03-30T14:39:32.268594+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 Pantellerite?
Highly evolved peralkaline rhyolite with dark color despite felsic composition. Rich in sodium and iron.
How can you identify Pantellerite?
Compare several properties rather than relying on colour alone. This entry records rock type: Igneous Extrusive; texture: Aphanitic to glassy; grain size: Fine to glassy; common minerals: Anorthoclase, Aegirine, Aenigmatite, Quartz. Confirm an important identification with additional field tests or qualified laboratory work.
How does Pantellerite form?
Erupts from peralkaline volcanic systems in rift settings as highly evolved alkaline magma.
Where is Pantellerite commonly found?
Pantelleria Italy , East African Rift, Iceland; found in rift-associated volcanic settings.
What is Pantellerite commonly confused with?
Pantellerite may be confused with Rhyolite, Comendite, Obsidian. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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