What is this mineral?

Question

Found this in my backyard. The larger boulder/rock was underground while the rest of the rocks were scattered around it. Looks like it has shiny silver or tiny crystals inside when I chip it or break it. Can anyone help me out?

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Answer 6

Hard to tell from the photos. Are the stones very heavy? Do they smudge your hand? You may need a professional to personally take a look at them for better ID. In which area are you located?

Answer 7

It looks like Shist.