How can you identify Buchite?

Compare several properties rather than relying on colour alone. This entry records rock type: Metamorphic Contact - extreme; texture: Partly glassy; grain size: Fine to glassy; common minerals: Glass, Cordierite, Mullite, Quartz. Confirm an important identification with additional field tests or qualified laboratory work.

What is Buchite commonly confused with?

Buchite may be confused with Hornfels, Obsidian, Fulgurite. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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Buchite identification and geology

Partially fused rock formed by extreme contact metamorphism immediately adjacent to igneous intrusions or by lightning strikes. Texture: Partly glassy. Rock type: Metamorphic Contact - extreme. Grain size: Fine to glassy. Parent rock: Sandstone/Shale. Minerals present: Glass, Cordierite, Mullite, Quartz. Formation: Forms by partial melting of country rock at the immediate contact with a hot igneous intrusion. Common geological settings: Found at immediate intrusion contacts and in fulgurites lightning-fused rock . Common look-alikes and related entries: Hornfels, Obsidian, Fulgurite.

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Hornfels
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: 2026-02-10T20:36:47.803468+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 Buchite?: Partially fused rock formed by extreme contact metamorphism immediately adjacent to igneous intrusions or by lightning strikes.
How can you identify Buchite?: Compare several properties rather than relying on colour alone. This entry records rock type: Metamorphic Contact - extreme; texture: Partly glassy; grain size: Fine to glassy; common minerals: Glass, Cordierite, Mullite, Quartz. Confirm an important identification with additional field tests or qualified laboratory work.
How does Buchite form?: Forms by partial melting of country rock at the immediate contact with a hot igneous intrusion.
Where is Buchite commonly found?: Found at immediate intrusion contacts and in fulgurites lightning-fused rock .
What is Buchite commonly confused with?: Buchite may be confused with Hornfels, Obsidian, Fulgurite. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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Buchite identification and geology

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Sources, scope & corrections

Common questions