Found on rough path in park Norfolk England, black stone with light patchy off white coating with rust spots, lightly attracted to magnet, black interior with patchy metallic spheres inside, pale blue powder substance under removed spheres, density of 3.2, poss type of pyrite maybe. Any ideas
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Hello again, this rock is in the Sedgwick uni museum Cambridge and is being dated for its age as the museum has no idea at moment as to what the rock is and they specialise in rocks and meteorites so hopefully will get some answers soon, the only thing that look similar to the tiny balls is some micrometeorites, been on meteorites page but no real ideas, some more pics that show true colour of rock.
Hi E U no grey fingers and its definitely not graphite, isn't graphite light in weight as this piece of rock is bit heavy for size and can feel its density and has nice cool feel to it when handling, only has slight grey streak mark against tile, little balls are attracted to magnet but not sure about rock, tiniest light coloured looking grains inside small cavity that appear to fuse into darker part of rock but could be dust size grains that have got inside somehow here are couple of pics of the grains mentioned but bit blurry I've broke open quite a few hard rocks but this was very hard to break open, I would like to know what the blue material is called and what makes it blue if anyone could tell me please as it looks like a sulphur, I haven't seen black rock that looks like this and doesn't look like a basalt, do take a look at micrometeorite images online and you will see metallic balls that look very similar.
