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2,234 questions

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what is this-wood opal,sedimentary stones?pretty colors into water(765g)

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asked Sep 2, 2015 by dodi71 (330 points)

1 Answer

+1 vote
The yellow staining looks like limonite which is a ferrous hydroxide compound found in many rocks where iron is common. FeO(OH). I have hundreds of these as they are very striking when I am looking for Lake Superior Agates.
answered Sep 2, 2015 by Weasel (58,360 points)
blue azurit?

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