Charnockite identification and geology

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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

2026-03-30T14:39:10.385555+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 Charnockite?

Orthopyroxene-bearing metamorphic or igneous rock. Named after Job Charnock, founder of Calcutta.

How can you identify Charnockite?

Compare several properties rather than relying on colour alone. This entry records rock type: Metamorphic High-grade; texture: Granoblastic to porphyroblastic; grain size: Medium to coarse; common minerals: Orthopyroxene, Feldspar, Quartz, Garnet. Confirm an important identification with additional field tests or qualified laboratory work.

How does Charnockite form?

Forms at granulite-facies conditions with dry, high-temperature metamorphism or from dry granitic melts.

Where is Charnockite commonly found?

India type locality , Sri Lanka, Antarctica, East Africa; found in granulite-facies terranes.

What is Charnockite commonly confused with?

Charnockite may be confused with Granulite, Granite, Gneiss. Compare multiple diagnostic properties because colour and surface appearance can overlap.