Arshia Posted January 4 Share Posted January 4 It feels very light. I haven't had the chance to weigh it yet. I have also not tested yet if it has any magnetic properties. Link to comment Share on other sites More sharing options...
FranzBernhard Posted January 4 Share Posted January 4 Could be anthracite (high-rank coal), yes. Rub it on some unglazed porcelain, for example, the underside of a coffee cup - what happens? Franz Bernhard 3 Link to comment Share on other sites More sharing options...
Rockwood Posted January 4 Share Posted January 4 It most likely is coal, but if the test fails you might consider very impure amber. I've heard of deposits from glacial moraines being burned almost like coal. 1 Link to comment Share on other sites More sharing options...
FranzBernhard Posted January 4 Share Posted January 4 5 hours ago, Rockwood said: I've heard of deposits from glacial moraines being burned almost like coal. Very interesting! Do you have a reference? Franz Bernhard Link to comment Share on other sites More sharing options...
Rockwood Posted January 4 Share Posted January 4 1 hour ago, FranzBernhard said: Very interesting! Do you have a reference? Franz Bernhard Sorry, no I don't. I think it was talked about in a film about the history of a region in New England where there was a terminal moraine. Perhaps part of a museum exhibit, but I'm not at all certain. I'm certain it was nothing close to the typical scale of a coal mining. More likely farmers with a bucket. 1 Link to comment Share on other sites More sharing options...
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