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I can’t figure out what type of rocks these are I would like to create pigment out of them to make a watercolor want to make sure they are safe, one is brick red the other is more of a deep magenta, they are both very hard and I found them I’m in upstate ny I found by the woods

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closed as off-topic by trond hansen, arkaia, Jan Doggen, Universal_learner, Peter Jansson Jul 8 at 10:56

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  • "Please review our rock identification guidelines to provide the missing information so that your question is both answerable and useful to new users." – trond hansen, arkaia, Jan Doggen, Universal_learner, Peter Jansson
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The one on the left looks like sandstone or gritstone (gritstone is a coarse variety of sandstone), The rock on the right looks as though it might be slate, but more photos would be helpful. There is nothing dangerous in either type, but I wouldn't have thought they'd be much use for pigments. A much more promising material for pigment is mineral iron ochre, which comes in a surprising variety of colours. It was often used by primitive tribes for cave painting and body decoration.

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