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Found 15 results

  1. Lucid_Bot

    Crinoid Matrix Removal

    Howdy! I found dozens of crinoid stems recently and most of them seem to have a thin layer of matrix attached. They were found in limestone, but I don't even know what mineral they've been fossilized in...calcite? Would I be able to remove the matrix with sandpaper and perhaps even polish them? Would sanding them remove visible segmentations? All help is appreciated, thank you.
  2. Callahan


    From the album: 39 years exploring Texas

    Another side of hematite club
  3. I recently acquired a small Araucaria cone and I am wondering what the general opinion on cutting/polishing fossil pine cones. Should it be cut to show off the internal structure or is it best to just leave it as a whole specimen? How do you feel about modifying fossils in general to enhance aesthetic, rather than scientific, value? I am interested to hear the Fossil Forum's opinions.
  4. Some of you may have noticed my flat polished fossils and fossil rocks. A few of you have some of them in their hands, e.g. @ricardo, @taj, @Monica, @fifbrindacier, @marguy I lost access to the cutting, grinding and polishing facility recently. No great loss, but I still have some small specimens that I want to have polished. What to do? I tried a low-cost, low-effort approach, using things I already have. 1. Cutting: I tried to cut some small specimens with an angle grinder. Well, it worked, more or less. Not the best option, don´t to it. Better would be a tile sa
  5. I have 1kg of rough Burmese amber stones ready to polish but I'm a little stumped as to where to start. I've polished Dominican pieces before using a dremel and wet sandpaper with success, but this stuff is older and much harder. In addition to the thin rough skin on these pieces, a lot have rock (or some combination of amber/earth) running through them making it difficult to figure out the plan of attack in regard to finding inclusions and getting a nice shine. Anyone here have experience with this?
  6. Lorney

    Polishing Ammolite

    I stubbled on a few small pieces of ammolite while out fishing. I have searched the internet and this forum for information and have come up with several different ways to clean and polish ammolite. However I have not been able to find a detailed process from start to finish to get ammolite looking it’s best. I know there are different qualities of ammolite and some require little to no work but mine needs some work to get it to look good without getting it wet. I have tried sanding for quite a while up to 600 grit paper. That’s the finest I could find but now have found up to 3000. Should I j
  7. Greetings from Central PA. I'm a total noob when it comes to fossil prep. Today I have a flattish piece, about 10" across and 1" thick. It from a large outcrop of wavy laminations that I believe are from a Keyser Formation stromatoporoid. It's pretty weathered and too hard to tell if pillars are present. So I'd like to try to grind/polish one edge. I have a good collection of metal and woodworking sanders and grinders available but nothing specifically designed for rocks. So my QUESTION IS.... is there a reasonable way to grind/polish the edge of this sample to look for
  8. Manticocerasman

    polishing some of my Goniatites

    I recently got a new job, and to make things even better, my job is at a company who processes and places floors and walls in stone, mostly marble. This opened a few opportunities for me , having access to a huge amount of polishing and cutting tools, so this week I gave it a try: I took 2 of my Goniatites that weren't of top quality, or to hard to prep. and today the helped me to cut the fossils and polish them. The fossils turned out really well here are my first 2 polished Manticoceras sp. from the Frasnian layers of Lompret in Belgium:
  9. I bagged a couple of Nautilus while down at Lyme Regis recently. The one on the left will be a reverse prepper and still has its shell on which is a joy to see. The other is a polish job, I have a vague idea at how to do it, although I’d appreciate if anybody could give me a rundown or step by step guide on how to get it gleeming, as it’s not something I want to go in blind like I usually do. I’d appreciate any advice. Thanks.
  10. Bone guy

    Surprise amber!

    So yesterday I went with my mom to the mountains to have some quality time and rock hound. One of the shops we visited allowed you to buy a bucket of sand filled with fossils and sift through it. We gave it a go, found some stingray barbs and a few echinoids. My favorite piece was a tiny piece of amber because it was my first amber acquisition. Well just this this evening I was going through my finds and I noticed a large rock I collected. It appeared black and was very lightweight so I thought it was some kind of charcoal. Then for some reason I decided to shine a light on the pi
  11. Ludwigia

    A slice of life...

    ...or at least it used to be alive. A friend of mine offered to give me a few of his unprepped ammonites in exchange for a bit of work for him. He asked me to cut, sand and polish a Macrocephalites ammonite for him which he suspected might show some nice interior designs. And he was right. I only took a photo of it moistened after cutting and before sanding and polishing and didn't think to get one of the end product before I gave it back to him, but I think you can already imagine how nicely it turned out in the end, don't you think?
  12. DeepTimeIsotopes

    Polishing Some "Chunkasaurus"

    I had to listen to a couple lectures for a school assignment which ended up totaling over 2 hours of straight listening. I cannot just sit and do nothing while I listen so I decided to do a little fossil prep. I have had this piece of what is commonly called "chunkosaurus". Chunkosaurus is a chunk of dinosaur bone that has no defining features and many times doesn't have a location attached to said specimen for us to assign it to a species or genus and so is almost practically useless to scientific endeavors. But I saw a future for this little piece so I downloaded my lectures into my phone an
  13. Hi everyone I recently got a large sandstone block (~20cm x 20cm x 20cm) which is like a shell deathbed (see pics). There's a layer of weathered material on the surface but underneath it's a nice piece. I was wanting to try and clean it up and do something nice with it. My ideas were to either (1) square it off and polish the block or (2) Square it off and slice it into multiple thin slabs (maybe 2-3cm thick) which could then be polished. I'm not sure if it's bad practice to slice up a fossil or not. Anyway, I was hoping someone might be able to give me some advice on w
  14. ShaeCD

    Petoskey too hard?

    HI there, I recently found a Petoskey Stone among others on the same tiny (12 foot) beach in Mid/Upper Michigan, as I have for years in the same location. Only...this one's different. I can't seem to polish it down entirely by hand OR with a dremel. It has a lot of beveled structure still compared to others I've seen, and it just feels HARD. There also seem to be tiny crystal bits in some places. Can Pestoskey Stones (limestone as I understand it) harden into Travertine or Marble and retain their distinct pattern and shape?
  15. holdinghistory

    How to polish amber?

    Hello, New to this forum. I recently have developed an interest in fossil inclusions in amber. After buying a number of prepared pieces, I decided I would like to try my hand at polishing some of my own. I found myself the owner of several hundred pieces of Dominican amber with inclusions. I have been doing a wet sand, and feel like I am close, but the pieces just don't seem to be getting a nice clear transparent finish. Any tips for finishing? I attached a few photos, the piece with the winged ants is from my collection and was polished by someone else, just for contrast with the
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