I found rocks looking like this in my backyard but cant get to know what they are or how to find out. Below are pictures
I don’t know if there’s more info I should mention. If there’s anything please advise
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1$\begingroup$ with the abundance of information you give in your question it should be easy to identify it(absolutely no information at all),sadly rock id question are off topic. $\endgroup$ – trond hansen Oct 17 '20 at 12:42
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1$\begingroup$ It might be some quartz contamined with some metal oxide? $\endgroup$ – peterh Oct 17 '20 at 13:16
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$\begingroup$ I remember, I've already seen this rock! It is sold as a so-named "salt lamp": s13emagst.akamaized.net/products/10554/10553217/images/… $\endgroup$ – peterh Oct 17 '20 at 13:25
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$\begingroup$ Could you please break some little dust from the rock, and taste it? I believe it should be salty. $\endgroup$ – peterh Oct 17 '20 at 13:26
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1$\begingroup$ The my first idea (contaminated quartz) remains. I hope you get an answer yet before the closure. $\endgroup$ – peterh Oct 17 '20 at 13:35
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See here for some ideas. You may want to do some testing, at least for Mohs hardness. But comparing your samples to the typical pictures shown in the referenced site I would guess an alkali feldspar (hardness = 6) or perhaps rose quartz (hardness =7). Note the hardnesses, a steel file falls in between at 6.5.
