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  1. Ararerose

    Gold or Pyrite

  2. Found some pyrite ammonites on Charmouth Beach. They are soaking right now in acetone. Need to get something like Paraloid-B72 or Paraloid B-67 which is unavailable here in US. All I know is that the equivalent needs to be hydrophobic. Any suggestions?
  3. Crusty_Crab

    Pyrite Disease Resources

    Not sure if these resources have been shared before, but this is how professional collection managers deal with pyrite disease/decay/rot. From the LA County Natural History Museum: https://lacmip.github.io/emu/documentation/pyritedecay/ June, 2019 Volume 11 of the Geological Curator is devoted to the subject: https://www.geocurator.org/images/resources/geocurator/vol11/geocurator_11_1.pdf Fenlon and Petrera's paper on page 9 has a good discussion about various coatings which were historically used as well as what the current best practice. It seems the current best practice for museums is storage in low oxygen microenvironments, i.e. storing it in a cardboard box with plastazote foam, putting in an RP System(R) Type K oxygen scavenger, and sealing in Escal (TM) Neo barrier film.
  4. Baking Geologist

    Silurian Dolostone Prep

    I apologize, I am not used to dealing with dolostone of this hardness. The rock of the Niagara Escarpment is serious stuff! What type of equipment besides cold chisels, dental tools and hydrochloric acid should I consider purchasing?
  5. I am fascinated by this taco-like concretion. Is its contents forever bound to the pyrite, left to me only speculation as to what it might be? Or can the matrix be removed to reveal what it contains?
  6. Fenguin1999

    Charmouth Pyrite Ammonites and Extra

    Hello everyone - I am getting into fossil collecting and recently had a trip to Charmouth, UK. I would like to try to ID some of the pyrite ammonite species I found there. I've written what I thought they might be based on information and photos I have found online but I am very much a beginner so I would like some help checking them. I've also included another pyrite fossil which I'm not sure what it is at the end. 35mm long paperclip for scale. Any help would be greatly appreciated! Thanks! 1: Both Promicroceras? 2: Not sure - maybe Echioceras? 3: Oxynoticeras? 4: Another Echioceras? 5: No idea - looks like a fragment of something conical with horizontal bands around it which can be sort of seen in the first image - mostly encased in pyrite.
  7. Ptychodus04

    A sad day

    It’s a sad day. Years ago, I collected a microconch and macroconch of Scaphites so. from the Late Cretaceous Arcadia Park Formation in Dallas, TX that were preserved in pyrite. I’ve collected dozens of pyritized ammonites from this particular site and all have been stable. These ammonites appeared to be stable for about 15 years until one day the pyrite decay started. I noticed it a couple days ago and soaked these specimens in iron out to try to stop the decay. Alas, my attempts were unsuccessful and both specimens crumbled to powder. Beware pyrite, even if you think it’s ok…
  8. Hello. I was wondering how to make from sylvania OH Brachiopods with pyrite shine. Because i have some that have pyrite but are covered in matrix and are not sparkling the same way that ones that have been treated with acid. Thanks! Trilobites_are_awesome.
  9. Hi again. My ever dwindling fossil collection, will hopefully survive this ID session. I found most of these in April 23 amongst cliff fall rocks on the beach in Charmouth UK. I found the large grey blobbly one on the right in September same place. There is one that looks like a perfect acorn and some similar. The large browner looking one seems to be made up of nutty nodes. I'm wondering if they are coprolites. I'm sure they were greyer when I found them. Should I coat these with B-72, should I leave them be or am I imagining fossils that are just funny shaped rocks? Thanks, Jes.
  10. Jesamine

    Ammonite, but what kind and why?

    Hi, I'm Jes and this is my first ID post, so hopefully the easiest. I know this is an Ammonite, but I don't know what kind. What features identify it as a certain species? I found it in Charmouth, Dorset, UK in April 2023. It was amongst the debris from a cliff fall on the beach. I believe it is Pyrite with some Calcite in the middle.
  11. ETV27

    Fossil seed from London clay?

    Found this at warden point, Sheppey. Wondering if it was a seed?
  12. Onno

    Petrified wood with pyrite

    Can somebody help me identify? Got this from a friend. Probably found in France. Think it's a nice piece but I want to know if this is petrified wood and is the outer layer pyritised? Thnx.
  13. ydnar


    Please help me identify this find. All by itself in farmers field. Had xrd analysis (X-ray diffraction analysis ) done. Results were text book mudstone composition. Cut off piece with diamond saw. Water was black and it smelled swampy. Trace fossils can be seen.
  14. ydnar


    Please help me identify this find. All by itself in farmers field. Had xrd analysis done. Results were text book mudstone composition. Cut off piece with diamond saw. Water was black and it smelled swampy. Trace fossils can be seen.
  15. ‘Golden’ (phosphate) fossils reveal new secrets; provide clues to Jurassic extinction event by: Eric Henrikson, KXAN News, Nexstar Media Inc., Texas, June 14, 2023 The paywalled paper is: Muscente, A.D., Vinnes, O., Sinha, S., Schiffbauer, J.D., Maxwell, E.E., Schweigert, G. and Martindale, R.C., 2023. What role does anoxia play in exceptional fossil preservation? Lessons from the taphonomy of the Posidonia Shale (Germany). Earth-Science Reviews, p.104323. Yours, Paul H.
  16. I've been recently looking into working with b72 for preserving and strengthening some of the pyrite and coal fossils I have. At the moment, I have a few questions regarding this topic: 1) For DFW folk, do you recommend any stores that sell b72 in the DFW area? For others, do you recommend any reputable online stores that ship it? 2) Should I store acetone in the original container I purchased it in? What is the safest part of the house to keep it? 3) What are any general tips/tricks you wish you knew before you started using b72? Feel free to answer as few of my questions as you'd like. All advice is greatly appreciated. Thanks!
  17. This week-end, during the easter feast with my club we organised our annual exhibition of fossils and minerals. Note the opalised belemnites and the huge Phacops rana africana. Each year we give pride of place to a subject. This time that was the pyrite. It was the occasion for the non-initiated people, and, particularly for the children, to discover the gold of the fools. We make ourselves the sandwiches and cakes, this year, one of our member made special cakes for kids.
  18. BionicNeko

    Shale/mudstone fossil or mineral?

    I am back with another one I cant quite work out! Being quite amateur I am still learning, so apologies if I'm mistaken on rock type etc. This was found on the jurassic coast of the UK, on the beach near Charmouth and is in shale/mudstone so already trying to break apart as you can see. I've been wondering if it's a sponge or root of some kind, or just mineral like pyrite as it has a goldy metallic sheen in some light, although it seems too brittle for that and has got what looks like more calci(?) layers when I look at the ends. Any help from all of you lovely lot would be greatly appreciated! Side note: if it is a fossil is there a good way to preserve these delicate shale ones to avoid the crumbling? I've been looking at the guides but there is so much information I might be tying myself in knots a little
  19. I found some pyritized plants a few days ago and noticed that one looks like a stem with seed pods. The fossil measures 2 cm and is from the Glenshaw Formation of Beaver County Pennsylvania. I'm nearly certain that what looks like a stem is a stem, but what are the three round things seemingly attached? Help is appreciated, thanks.
  20. Lucid_Bot

    Pyrite Plants--Gold and Green

    Last week I was hunting in my usual location in Allegheny County Pennsylvania (Glenshaw Formation) and found that several of my specimens have splotches of what appears to be pyrite crystals. With some of the broken fossils I could see that even the insides contained gold-colored pyrite. On the other side of these plates were what looked like rootlets covered in a pale green mineral. Is this pale green mineral pyrite as well? Is there some way I could test this? Thanks for the help.
  21. Hello all, I recently ordered a big piece of Wheeler Shale and have had loads of fun splitting the rock and finding Trilobites. I've got a nice complete specimen of each of the common species (Kingii, Wheeleri, Interstricta) as well as a ton of molts, cephalons, and pygidiums. I am a new prepper and thought this would be a good way to start, though my dream is to eventually learn how to do Moroccan or Russian trilobites. I've been practicing on the molts and parts of the trilos, but the head I am prepping currently looks like it is pyritized. It's got a few pyrite pieces on it, but as I'm washing and brushing it off, the whole thing looks to have a golden sheen. I'm worried the water I've been putting on the specimens to soften the matrix will damage the fossil, though I've been scrubbing and brushing it off before it soaks in too much. Should I stop using the water as soon as possible or is it okay? And how do you more experienced preppers handle the pyrite? I love the look of the gold and don't want to damage it. For now I've been using these tools: Dental pick Thin Steel Wool Wire brush Kneaded Eraser Spray Bottle with Water I'm planning to get an air scribe soon to prep the complete trilos with.
  22. Hey all! When I went on a collecting trip in the Hell Creek Formation in Montana, there were many iron concretions, and I've noticed that some specimens from there appear to be iron-stained. This makes me wonder if pyrite could be among the minerals involved in fossil preservation there. Are some of the bones found in the Hell Creek pyritized, and how could those be distinguished from others preserved differently? If so, do those Hell Creek specimens ever develop "pyrite disease," and what would be the warning signs to look out for? Thanks so much for sharing your knowledge!
  23. BK1

    Cleaning pyrite

    I’ve got a few pyrite “balls” and clusters that I found a long time ago. They’ve oxidized and changed to a grayish color. How do I get them back to the original color they were when I pulled them out? Been hesitant to use anything for fear of making it worse or even compromising the pyrite permanently. Right now they look like dirt clods. Posted a picture of the smallest one to give an idea of their current state. Any suggestions? Thanks!
  24. Found this at the weekend on Charmouth beach, the black flakes look like scales or possibly bone. We looked at hundreds of bits that morning but nothing else like this, any ideas?
  25. From the album: Misha's Silurian

    Stegerhynchus neglecta Middle Siluran Waldron Shale Waldron Indiana
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