Naked Science Forum
Non Life Sciences => Geology, Palaeontology & Archaeology => Topic started by: araghu on 27/06/2015 13:25:14
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I found this rock and it has strange markings on it. It definitely feels very hard and can cause scratches on Granite. I have been unable to cause scratches on it with pen knives. The markings on it do not seem to be superficial and seems to be a part of the rock itself. The rock is smooth to touch.
Please help identify.
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Looks like an agate to me.
https://en.wikipedia.org/wiki/Agate