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Carbonatite identification and geology

Carbonatite rock reference specimen

Rare igneous rock containing 50% carbonate minerals. The only silicate-poor igneous rock; source of rare earth elements. Texture: Variable. Rock type: Igneous Intrusive/Extrusive. Grain size: Fine to coarse. Minerals present: Calcite, Dolomite, Apatite, Magnetite, Pyrochlore. Formation: Forms from carbonate-rich magmas in continental rift settings. Ol Doinyo Lengai Tanzania is the only active carbonatite volcano. Common geological settings: East Africa, Brazil, Canada, Scandinavia; found in alkaline igneous complexes. Common look-alikes and related entries: Marble, Limestone, Travertine.

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
2026-03-30T14:38:14.237264+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 Carbonatite?
Rare igneous rock containing 50% carbonate minerals. The only silicate-poor igneous rock; source of rare earth elements.
How can you identify Carbonatite?
Compare several properties rather than relying on colour alone. This entry records rock type: Igneous Intrusive/Extrusive; texture: Variable; grain size: Fine to coarse; common minerals: Calcite, Dolomite, Apatite, Magnetite, Pyrochlore. Confirm an important identification with additional field tests or qualified laboratory work.
How does Carbonatite form?
Forms from carbonate-rich magmas in continental rift settings. Ol Doinyo Lengai Tanzania is the only active carbonatite volcano.
Where is Carbonatite commonly found?
East Africa, Brazil, Canada, Scandinavia; found in alkaline igneous complexes.
What is Carbonatite commonly confused with?
Carbonatite may be confused with Marble, Limestone, Travertine. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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