Kaylak Posted April 5, 2020 Share Posted April 5, 2020 Hi all, I found this in a stream in Eureka, MO, USA. If anyone can help me with identifying, please do! Link to comment Share on other sites More sharing options...
Thecosmilia Trichitoma Posted April 5, 2020 Share Posted April 5, 2020 It looks geological to me. Others might be able to tell you more. @ynot 1 It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt -Mark Twain Link to comment Share on other sites More sharing options...
caldigger Posted April 5, 2020 Share Posted April 5, 2020 Looks like a piece of cave formation, broken off stelagmite perhaps. 1 Link to comment Share on other sites More sharing options...
Kaylak Posted April 5, 2020 Author Share Posted April 5, 2020 Thank you! Link to comment Share on other sites More sharing options...
Rockwood Posted April 5, 2020 Share Posted April 5, 2020 7 hours ago, caldigger said: Looks like a piece of cave formation, broken off stelagmite perhaps. I just can't name this one flow. I think it's concretion that formed in situ. 1 Link to comment Share on other sites More sharing options...
ynot Posted April 5, 2020 Share Posted April 5, 2020 I agree with speleothem (cave calcite). Does it fizz when acid (vinegar will work) is applied? 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
westcoast Posted April 5, 2020 Share Posted April 5, 2020 2 hours ago, Rockwood said: I just can't name this one flow. I think it's concretion that formed in situ. I can't see this as speleothem either. 1 Link to comment Share on other sites More sharing options...
Rockwood Posted April 5, 2020 Share Posted April 5, 2020 2 hours ago, ynot said: I agree with speleothem (cave calcite). Does it fizz when acid (vinegar will work) is applied? How would the crystals get this size and still preserve the information needed for such an identification. 1 Link to comment Share on other sites More sharing options...
Kaylak Posted April 6, 2020 Author Share Posted April 6, 2020 14 hours ago, ynot said: I agree with speleothem (cave calcite). Does it fizz when acid (vinegar will work) is applied? I shall experiment and get back to you. Link to comment Share on other sites More sharing options...
ynot Posted April 6, 2020 Share Posted April 6, 2020 22 hours ago, Rockwood said: How would the crystals get this size and still preserve the information needed for such an identification. ?????? How would it not hold the information of a smaller crystal? Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Rockwood Posted April 6, 2020 Share Posted April 6, 2020 54 minutes ago, ynot said: ?????? How would it not hold the information of a smaller crystal? I've never seen drops of water result in crystals any where near this size to begin with. And I have visited the Luray Caverns. How would they not get lost in the flow if by some means they did form ? Link to comment Share on other sites More sharing options...
ynot Posted April 6, 2020 Share Posted April 6, 2020 3 hours ago, Rockwood said: I've never seen drops of water result in crystals any where near this size to begin with. And I have visited the Luray Caverns. How would they not get lost in the flow if by some means they did form ? Do not see any crystals in the piece. I see erosional features that left some odd shapes. Never got a size on it (Nobody asked @Kaylak for a size either.). It looks like smaller than a fist. I have seen chunks of cave flowstone that were 3 to 4 feet thick in limestone caves and quarries. 15 hours ago, Kaylak said: I shall experiment and get back to you. While You are testing it, please, try to scratch it with a nail (iron, not finger.) It may be a chunk of cryptocrystalline quartz... agate is a possibility, but it looks like a chunk of calcite to me. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Rockwood Posted April 6, 2020 Share Posted April 6, 2020 You know how I like to disagree. 1 Link to comment Share on other sites More sharing options...
Kaylak Posted April 14, 2020 Author Share Posted April 14, 2020 On 4/5/2020 at 9:01 AM, ynot said: I agree with speleothem (cave calcite). Does it fizz when acid (vinegar will work) is applied? It is not fizzing with vinegar and scratching by a nail Link to comment Share on other sites More sharing options...
Kaylak Posted April 14, 2020 Author Share Posted April 14, 2020 On 4/6/2020 at 3:19 PM, ynot said: Do not see any crystals in the piece. I see erosional features that left some odd shapes. Never got a size on it (Nobody asked @Kaylak for a size either.). It looks like smaller than a fist. I have seen chunks of cave flowstone that were 3 to 4 feet thick in limestone caves and quarries. While You are testing it, please, try to scratch it with a nail (iron, not finger.) It may be a chunk of cryptocrystalline quartz... agate is a possibility, but it looks like a chunk of calcite to me. Also, it is relatively small Link to comment Share on other sites More sharing options...
ynot Posted April 15, 2020 Share Posted April 15, 2020 21 hours ago, Kaylak said: It is not fizzing with vinegar and scratching by a nail Piece of agate would be My best guess. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
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