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Found 14 results

  1. Ericlin

    Storing fragile amber

    I brought a small lot of amber; they are from the hell creek formation, wibaux county Montana. I was wonder how I should store them. They are extremely fragile, and I’m not sure if I should use superglue or something on them. Let me know if there is anything else I should know about storing them and thanks alot!
  2. Prepping a fossil in the GRF layered matrix is one thing. Carefully and slowly. Prepping a limestone embedded fossil...jack hammer...okay mini jack hammer = air scribe or engraver. Prepping a concretion...depends on the matrix and condition I guess. So I'm now facing a different approach to a concretion which could best be described using Mars Candy, Hershey's Chocolate or Harry Potter Chocolate Frogs wording. Hard on the outside coating with a munchy, crumbly inside, filled with surprises. What I did on site while collecting was to first discern what concretions were the "right " ones. Looking back, they ALL were. I just happened to have picked the type that falls into a thousand piece puzzle when you crack it open. Whereas later in the excursion I began to notice that the harder solid concretions also had fossils inside them, perhaps only a few of a single larger specimen like the English Coast nodules. " Whack, Crack...instantly prepped Ammonite!" The info I researched suggested to look for the rusty brown concretions. Kind of suggestive, IMO. One person's rusty brown isn't the same to another. So finding a chocolate brown concretion first and having every species of mollusk pour out of it suggested to me to find more chocolate. So the question: How do I prep these correctly? Several options obviously - Whack it. Gently tap it. Manually pry it apart. Air scribe usage. Or the freeze thaw method. The last one, F&T, seems like a quick way to completely disassemble the entire puzzle in one thaw cycle. None seem to be the best method in my opinion as each concretion is a bit different. However most have similar traits. Hard rind on the outside up to an inch in thickness. Or a slightly less hard rind with more obvious cracks. Did I mention cracks? More cracks than the San Andreas fault line. I'll be buying bulk cyanoacrylate before the weeks out. My first prep attempt last night did get CA'd wherever I found a crack. Parts on the backside would wiggle loose while scraping, picking, etc. on the front side. Anyone with experience prepping crumbly concretions, please advise. I'm going the cautious route but still think some nice ammonites will crumble. Some seem hardened with mineralization and others look like dark brown sugar crystals pressed into an ammonite mold. Crumbles like that, too. Are they then Steinkerns? This one from last night's prep work. And a new home on a book case shelf.
  3. I found these fossil crabs. Previously, a few years ago, I had already extracted some, I prepared them by removing the slightly hard earth that covered them, but there is a thin layer from where the crab starts (where I saw it and extracted it) to the layer that worked which is the one that is less damaged. Therefore, it is somewhat fragile and I wanted it to be a more solid piece that I would not be afraid to manipulate and that could break. I wanted to know what is suggested in these cases (as long as it is necessary and does not spoil the fossil, if it is usually done it is the first time I do it) so that a fossil is not so fragile and thin, such as putting it in the deteriorated and less showy part a layer of plaster or something like that. I hope I have explained myself, sorry if my English is not very good, I leave you photos of the crabs. Thank you very much! here is the piece, the current one, the one I found recently (little work, without discovering the main part) the same piece seen from the side the same piece seen from the part where I found it This is a crab that I found a few years ago that is already working. The view is from the side (You see that the piece looks a bit thin and fragile) the same piece seen from the part in which it was found the same piece on the worked side
  4. Haravex

    Barasaurus prep thread

    So, I thought I would share this topic with you all. This is going to be the beginning of a long thread with any luck. This is the first one I have prepared, coming close to the end. It's turned out ok. I feel it could be better, While looking at multiple examples, and studying the bone through journals, previously prepped specimens, and other resources is great. It's a completely different game, learning to prepare first hand, and the differences in each nodule affecting position and rotation of the bones. So a friend of mine contacted me saying he had some unprepared nodules, and me loving a prep challenge, accepted. . Arriving shortly after my trip to the IOW, (which went well and I will do a report on shortly) this nodule was delivered by the good local postal woman It had already been split to check the contents, and was more of an example piece than a more pristine uncracked nodule And this is the current prep stage I am at. Just exposing more of the vertebrae column and ribs and the fine details, and smoothing out the scribe marks. This work can take some time, as it needs b72 after each new section is exposed, due to how small and fragile the bones are, but when you compare this to how they are normally seen( just split in half with a complete loss of detail) I think the time is well worth the effort, and once this is finished I can't wait to get started on the next one. I hope you all enjoy reading this short prep story and will try and post more of my prep work in the future. (Been slacking on the show and tell part in recent months.)
  5. Hello TFF members - I'm in need so some advice on this one please. So this is my first post (happy to be corrected on any newbie errors) and although preparation is my favourite part of the fossil game, I am 'fairly' new to it - In other words, please go easy on me, I'm aware it's going to be all too tempting to say I've bitten off more than I can chew here... I recently purchased this Mosasaur skull from a well known European fossil auction site; you may have seen it yourself if you follow such things. It wasn't 'hugely' expensive, but that doesn't mean I'm not serious about making something good out of it and giving it a lot of attention (which clearly it will need...). It is from Morocco, was sold as a Platycarpus (from the teeth I would tend to agree, but please correct if you think otherwise) and originally was complete in a plaster jacket. The seller decided to prep it and remove from the jacket. Whilst this may have exposed more of it, some quite nicely, they have also turned it into the most insanely fragile fossil I have ever come into contact with! It was already in five large pieces when advertised for sale, and despite being very well packaged, has suffered further in transit. The matrix is not much more than hard (ish) sand and the bone only marginally more solid. Doesn't help that it's so crushed, so only matrix between each piece. Clearly leaving it in the matrix, perhaps replacing the jacket with something more aesthetically pleasing as part of a mount and prepping only the surface would have been the way to go, but it's beyond that now, so I would really love some thoughts and suggestions on the following: 1 - Immediate stabilisation and strengthening to prevent further breakages and reattach the broken sections (buckets of CA to solidify the sand matrix and reduce porosity to enable gluing?) 2 - Rebuilding/mounting (combining these two, as it will never be strong enough to hold in one piece and the mounting technique will likely need to be integral as it will need complete support across the entire back. It would never be my first choice, but I'm thinking a rebuilt matrix under the fossil to support and hold it together at the same time?) Ok, lots of text there for background and to give you more context, here are some pictures which will help... Original, in jacket: Advert pics: And another: Now it's home, in a slightly more confused state: And another: Last one, you get the idea: If anyone is interested in seeing more of it, please let me know, have lots of pics. It's an interesting item and despite being crushed to hell, looks to be fairly complete (the reverse tells it's own story too, more teeth there, etc.), but it's realistically only ever going to be an 'in matrix' display piece. Out of curiosity, I believe it's upside down, with the two maxilla visible on top and the upper jaw section being below, sure someone will easily be able to confirm? Anyway, enough from me, would love your thoughts and really appreciate anyone who has the time to consider and reply. If I haven't been clear or you need more info, please just let me know. Thank you, Dave
  6. Hello everyone! Just got home from my weekly vacation and started immediately the preparation. The matrix is soft, mostly loose sandstone and once wet you can process it easier. Right now I have no power tools, only some screw drives and picks. The process seems that will take a lot of time. Any advice is welcome. I also need advice concerning some issues. 1. One urchin that after making it wet, a crack was revealed. There is possibility that the crack expanded by half millimeter. How I treat that? Naturally dry it and application of 20% paraloid? Then proceed as above? 2. Another sample has a small piece broken, which of course I collected. The broken piece has some matrix on it and is less than 2cm. Again paraloid and then same process? 3. The drying process can be accelerated with sunlight or this might be dangerous and may cause cracks? Thanks everyone. The first pic is the one I am working now. It was like a sandball before removing most of the matrix and now I am doing detailing. The second is the slightly cracked at 11 o'clock. The white side was exposed in the weather, the rest was within sandstone wall in the quarry.
  7. Yoda

    Flaking finds

    So last week I went on my 2nd collecting trip to Yaxley. Was a bit disappointed. Didn’t find much. Just a clam, and this ammonite and gastropods The ammonite and gastropods are very flakey. If you barely touch them, some of the white material comes away What is the best way to stabilise them?
  8. Bone 1

    Bone 2

    This piece broke. 3.5” long approximately. It sounds like rock when you flick it. Again, maybe that’s normal but I don’t know. I would like to know how old it may be. I can only add some pictures due to the pic MBs. The rest I will add in the reply section of this pic.
  9. Hi All, I was given this fish as a present for Xmas. It is labelled as: Syngatus sp, Miocene, Nevada USA The matrix seems very soft and fragile. How would I stabilise it and give it more strength. Thanks
  10. So... This specimen is currently in ID- section here, but since it doesnt have any suggestions, I figured out that I should try to get some more features to help IDing. This is from northern Germany. I found this little stone and after a while, I decided to smash this into another rock. It kinda worked and this is what was in there. The fossil itself is quite fragile, and I accidentally managed to swipe lots of the material away from the other half. That was poor handling from my part.. :S I must say that Im quite inexperienced (only "re-prepped" one Otodus tooth which had some features under rock. Turned out to be quite fine fore first "prep" IMO). I have magnifiers, dental tools, glues etc for basic working but no powertools bc I live in an apartment building. Not saying that I would use any powertools for this. How would you guys deal with this, or is this something I shouldnt try to tackle?
  11. FossilNerd

    Should I Consolidate?

    I recently purchased this Alethopteris sp. at a local fossil show. It is typical of shale found in St. Clair Pennsylvania being beautiful, but also very fragile. It’s my first plant fossil that isn’t petrified wood so I’m very excited about it! My question to all you experienced preppers out there is... Should I consolidate it? It has the characteristic layering associated with shale, which tend to split and come apart easily. I don’t plan on the piece being handled much, if at all, but don’t want it falling to pieces in a few years as it sits in my display case. If best practice is to consolidate, what consolidant would you recommend?
  12. Ptychodus04

    Mammoth Tusk Prep

    @StevenJDennis brought me quite the project. It's a central Texas mammoth tusk that is in terrible shape! Texas tusks are as close to the complete opposite in preservation as compared to Siberian or Alaskan tusks. They are always brittle, broken, and just looking for an excuse to fall apart. Props to Steven for rescuing this monster from a terrible fate in the back of an old man's shed! The pics below show the tusk in the sate of preservation as they arrived to me. I have spent the last week with the fragments on end literally pouring medium viscosity PVA solution (about as thick as 20w 20 motor oil) into the cracks in an effort to stabilize them. 1 gallon later and they are beginning to toughen up a bit. PVA application will continue until the fragments will no longer absorb the solution. Then, I will attempt reassembly of the fragments. Unfortunately, there has been serious degradation of the fragments in many places. More to come!
  13. Yoda

    Fragile plant help

    Hi, I am after a bit of advice please. Finally got out on a collecting trip at the dump of an abandoned coal mine. Plenty of plant material but it is very very fragile. Some of the pieces literally disintegrated as I lifted them up. So my initial thought is that with the specimens I have, how do I go about preserving them - prevent further cracking and flaking. I will tackle the broken ones at a later stage. The specimen in the photo is roughly 10 cm. Most of them are similar size or smaller. Any advice appreciated
  14. moriniboy

    Pteranodon bone

    From the album: Nigel's album

    Wall thickness is very thin and fragile, consolidated for strength and then left well alone. Location of find USA
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