Please help me identify this

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Offline wheatley

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Please help me identify this
« on: 10/10/2011 22:55:05 »
Hello everyone,

I would love to know what this rock is. I found it several years ago in South West England after our garden wall collapsed during a storm. It was protruding slightly from the soil about one foot below the surface. It's approximately 50mm in length. I would appreciate any help  [;)] Thank you.

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Offline Bass

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Please help me identify this
« Reply #1 on: 11/10/2011 19:10:38 »
Looks like some sort of geode.  concentric bands are mineral precipitates, the darker being quartz (or jasper, chert, chalcedony)- the yellow is softer and weathers more easily (carbonate?).
Old enough to have a grandson
Slow enough to study rocks
Thirsty enough to find a pub

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Offline wheatley

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Please help me identify this
« Reply #2 on: 13/10/2011 23:26:02 »
Looks like some sort of geode.  concentric bands are mineral precipitates, the darker being quartz (or jasper, chert, chalcedony)- the yellow is softer and weathers more easily (carbonate?).

Thank you very much Bass.