New Members Squeemish Posted Tuesday at 03:24 AM New Members Share Posted Tuesday at 03:24 AM This was found along the Rock River in North West Illinois. Any info about it's composition would be appreciated. 2 Link to comment Share on other sites More sharing options...
Ludwigia Posted Tuesday at 08:50 AM Share Posted Tuesday at 08:50 AM This is not a fossil, but a geode, in this case a druse with quartz crystals. Certainly not an egg, since the shape is not uniform and there is no sign of shell substance to be seen. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Rockwood Posted Tuesday at 10:11 AM Share Posted Tuesday at 10:11 AM From that area, I wouldn't rule out geodized crinoid calyx. I can't say that it is, but sometimes they are not at all obvious. Link to comment Share on other sites More sharing options...
Ludwigia Posted Tuesday at 11:52 AM Share Posted Tuesday at 11:52 AM Take your choice then. I'll stick with pure mineral. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
oilshale Posted Tuesday at 12:31 PM Share Posted Tuesday at 12:31 PM Not a fossil - pure mineral. 1 Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
Denis Arcand Posted Tuesday at 06:12 PM Share Posted Tuesday at 06:12 PM anyway, it's a nice geode 3 One fossil a day will keep you happy all day. Welcome to the FOSSIL ART Link to comment Share on other sites More sharing options...
New Members Squeemish Posted Tuesday at 08:42 PM Author New Members Share Posted Tuesday at 08:42 PM Thanks everyone! 2 Link to comment Share on other sites More sharing options...
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